1
|
Kyaw L, Thandapani K, Tan L, Peng HM, Goh B, Lu J, Raman L, Tai BC, Anantharaman V, Tiong HY. Choosing the larger kidney on CT volumetry: a study on the early post-donation kidney function of living donors. Int Urol Nephrol 2024; 56:97-102. [PMID: 37653357 DOI: 10.1007/s11255-023-03737-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 08/06/2023] [Indexed: 09/02/2023]
Abstract
BACKGROUND Selecting the smaller kidney for donation has been advocated if there is a size difference of > 10% between the 2 kidneys but has never been prospectively evaluated. With increase in donor nephrectomies, it is important to evaluate this to minimize loss of renal function to donors. METHODS 75 consecutive donor nephrectomy patients were included in our longitudinal study. The Split Renal Volume (SRV) of bilateral kidneys were measured using contrasted computer tomography scans and patients segregated into 2 groups depending on donated kidney having more (Group 1) or less than (Group 2) 52.5% of SRV. RESULTS Patients in Group 1 (n = 19) and 2 (n = 56) were of similar age (43.8 vs. 48.3), BMI (22.4 vs. 25.2), sex (57.9 vs. 55.4% women), respectively. Although total kidney volumes were similar in both groups, Group 1 had significantly smaller right kidney volumes (120.4 ± 24.9 vs. 142.7 ± 28.4 mls, p = 0.003). EGFR pre-operatively (116.3 ± 20.8 vs. 106.3 ± 23.8 mL/min/1.73 m2) and at 6-months (65.7 ± 13.3 vs. 66.9 ± 15.5 mL/min/1.73 m2) were not different between groups. However, patients in Group 1 had significantly greater absolute (50.6 ± 14.9 vs. 39.5 ± 14.7 mL/min/1.73 m2) and relative decline (43.0 ± 8.6 vs. 36.3 ± 10.6%) in eGFR at 6 months (p = 0.06, 0.009). CONCLUSION With a SRV difference of 5% between the 2 sides, removal of the larger kidney for living kidney donation resulted in greater early decline of renal function than kidney donors whose larger or equivalent kidney is preserved.
Collapse
Affiliation(s)
- Lin Kyaw
- Department of Urology, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore
| | | | - Lynnette Tan
- Department of Urology, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore
| | - Hong Min Peng
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Benjamin Goh
- Department of Urology, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- National University Centre for Organ Transplantation, Singapore, Singapore
| | - Jirong Lu
- Department of Urology, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore
- National University Centre for Organ Transplantation, Singapore, Singapore
| | - Lata Raman
- Department of Urology, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore
| | - Bee Choo Tai
- School of Public Health, National University Singapore, Singapore, Singapore
| | - Vathsala Anantharaman
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- National University Centre for Organ Transplantation, Singapore, Singapore
| | - Ho Yee Tiong
- Department of Urology, National University Hospital, 5 Lower Kent Ridge Rd, Singapore, 119074, Singapore.
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- National University Centre for Organ Transplantation, Singapore, Singapore.
| |
Collapse
|
2
|
Burgos Revilla FJ, Artiles Medina A, Domínguez Gutiérrez A, Muriel García A, Figueiredo A, Gómez Dos Santos V. Vascular closure devices in living-donor nephrectomy: a much-needed systematic review and meta-analysis focusing on safety. BJU Int 2023; 132:239-251. [PMID: 37017627 DOI: 10.1111/bju.16025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2023]
Abstract
OBJECTIVE To assess the safety of vascular closure devices in living-donor nephrectomy (LDN), as staplers and non-transfixion techniques (polymer locking and metal clips) are the methods employed to secure the renal vessels during laparoscopic and robotic LDN, but the use of clips has come into question since the United States Food and Drug Administration and manufacturers issued a contraindication. METHODS A systematic review and meta-analysis were conducted to assess the safety of vascular closure devices (International Prospective Register of Systematic Reviews [PROSPERO] registration: CRD42022364349). The PubMed, Scopus, the Excerpta Medica dataBASE (EMBASE), and the Literatura Latino-Americana e do Caribe em Ciências da Saúde (LILACS) databases were searched in September 2022. For comparative and non-comparative studies, incidence estimates and odds ratios (ORs), respectively, for the main variables regarding safety of vascular closure devices were pooled by using random effects meta-analyses. Quality assessment of the included comparative studies was conducted using the Risk Of Bias In Non-randomised Studies of Interventions (ROBINS-I) tool. RESULTS Of the 863 articles obtained, data were retrieved from 44 studies, which included 42 902 patients. In non-comparative studies, the pooled estimate rates for device failure, severe haemorrhage rate, conversion to open surgery, and mortality were similar for both clips and staplers. Regarding the meta-analyses for comparative studies (three studies), there were no significant differences between the two groups for the severe haemorrhage rate (OR 0.57, 95% confidence interval [CI] 0.18-1.75; P = 0.33), conversion to open surgery (OR 0.35, 95% CI 0.08-1.54; P = 0.16), or death rate (OR 3.64, 95% CI 0.47-28.45; P = 0.22). Based on weak evidence, device failure was lower in the polymer clip group (OR 0.41, 95% CI 0.23-0.75; P = 0.00). CONCLUSIONS This study has confirmed that there is no evidence for the superiority of any vascular closure device in terms of safety in LDN. Standardised recommendations for vascular control in this context should be carefully designed and prospectively evaluated.
Collapse
Affiliation(s)
- Francisco Javier Burgos Revilla
- Department of Urology, Hospital Universitario Ramón y Cajal, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), University of Alcalá, Madrid, Spain
- Board of the EAU Section of Transplantation Urology (ESTU), Coimbra, Portugal
| | - Alberto Artiles Medina
- Department of Urology, Hospital Universitario Ramón y Cajal, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), University of Alcalá, Madrid, Spain
| | - Ana Domínguez Gutiérrez
- Department of Urology, Hospital Universitario Ramón y Cajal, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), University of Alcalá, Madrid, Spain
| | - Alfonso Muriel García
- Clinical Biostatistics Unit, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), CIBERESP, University of Alcalá, Madrid, Spain
| | - Arnaldo Figueiredo
- Board of the EAU Section of Transplantation Urology (ESTU), Coimbra, Portugal
- Department of Urology and Kidney Transplantation, Centro Hospitalar e Universitário de Coimbra (CHUC), Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Victoria Gómez Dos Santos
- Department of Urology, Hospital Universitario Ramón y Cajal, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), University of Alcalá, Madrid, Spain
- Board of the EAU Section of Transplantation Urology (ESTU), Coimbra, Portugal
| |
Collapse
|
3
|
Fallatah M, Aldughiman A, Binjawhar A, Melaibary B, El-Tholoth H, Al-Gadheeb A, Alzahrani A, Zahrani T, Alakrash H. Renal pedicle control in laparoscopic donor nephrectomy: Evaluation of a single-center experience. Urol Ann 2022; 14:152-155. [PMID: 35711485 PMCID: PMC9197010 DOI: 10.4103/ua.ua_34_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 08/16/2020] [Indexed: 11/17/2022] Open
Abstract
Introduction and Study Purpose: Renal pedicle control is a crucial period in laparoscopic donor nephrectomy (LDN). Till now, there is no standardized technique for renal pedicle control. Proper evaluation and investigation of the different ways of renal vessel control have to be done to avoid any calamitous event. We aim to prove the safety and reliability of the Hem-o-Lok clips for the renal vascular control in transperitoneal LDN. Methods: All LDNs or hand-assisted LDNs done between January 2016 and December 2018 were collected. The primary outcome was the safety of the Hem-o-Lok clips. The secondary outcomes were blood loss, ischemia time, hospital stay, cost, and operative time. The data were analyzed using SPSS 20, and a statistical package was conducted. Results: The data showed that 238 laparoscopic donor nephrectomies were done. The renal pedicle control during the 1st year was done using a vascular stapler for the artery (63 cases) and two polymer self-locking clips extra-large (XL) for the vein. Two events were reported in the form of mechanical failure. In the following 2 years, the artery was controlled using polymer self-locking clips large (L) few millimeters distal to the aorta and two metallic clips distal to it to increase the safety and stability of the vascular stump (175 cases). However, the vein was controlled by the two polymer self-locking clips XL. There was no reported intraoperative complications or events related to this way of pedicle control; there was no open conversion or blood transfusion required. There was no postoperative complication or collection in ultrasound. Conclusion: Using a combined polymer self-locking clip few millimeters distal to the aorta and two metallic clips distal to it for renal artery control in laparoscopic donor nephrectomies is cost-effective and safe. However, further and broader evidenced base studies are still needed to establish a standard technique for renal pedicle control.
Collapse
|
4
|
Vascular Control of the Renal Pedicle Using Non-Absorbable Polymer Ligating Clips in Hand-Assisted Living Donor Laparoscopic Nephrectomies. Nephrourol Mon 2019. [DOI: 10.5812/numonthly.91761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
|
5
|
Pek GXW, Ngoh CLY, Teo BW, Vathsala A, Goh BYS, Yong CHR, Raman L, Tiong HY. Visceral obesity in Asian living kidney donors significantly impacts early renal function after donor nephrectomy. World J Urol 2018; 37:2231-2236. [PMID: 30456710 DOI: 10.1007/s00345-018-2566-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/12/2018] [Indexed: 12/31/2022] Open
Abstract
INTRODUCTION Obesity may be a risk factor for kidney donors to develop reduced renal function. The Framingham heart study suggested that visceral adipose tissue (VAT) confers a more adverse metabolic profile compared with subcutaneous adipose tissue (SAT). Asians tend to have a higher VAT composition and it is unclear if their kidney function is affected differently. We hypothesized that Asian living kidney donors who have visceral obesity are at a higher risk of renal function deterioration 1 year after donation. METHODS Between 2011 and 2014, we retrospectively evaluated data from 73 consecutive patients (52% male; mean age 44.9 ± 11.7 years) before they underwent donor nephrectomy and at their 1 year routine follow-up. VAT and SAT were measured at the level of the umbilicus on pre-operative computerized tomography (CT). Visceral obesity (VO) was defined as a VAT > 100 cm [2] and patients were then further divided and compared in two subgroups: VAT > 100 and < 100 cm [2]. Estimated glomerular filtration rate (eGFR, mL/min per 1.73 m [2]) was calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation pre-operatively and 1 year post-operatively. RESULTS Both subgroups had similar baseline kidney function (P = NS) pre-operatively. At the 1 year follow-up, patients with VO experienced a more significant decline of renal function (109 ± 9 to 89 ± 8 mL/min per 1.73 m2), compared to those without VO (111 ± 12 to 96 ± 11 mL/min per 1.73 m2, P = 0.013). VO was associated with a body mass index (BMI) > 25 kg/m2 (P < 0.001), male gender (P < 0.001) and older age at the time of donor nephrectomy (48.0 vs 39.5 years, P = 0.01). The presence of hypertension or hyperlipidaemia pre-operatively, choice of surgical approach, and post-operative complication rates, did not differ significantly between the subgroups. CONCLUSIONS Visceral obesity as defined by VAT > 100 cm2 at the level of the umbilicus on cross-sectional imaging, may have a significant impact on early renal function after donor nephrectomy. Adiposity markers, as measured by cross-sectional CT imaging, may be incorporated into routine pre-operative kidney donor workup.
Collapse
Affiliation(s)
- Gregory Xiang Wen Pek
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Clara Lee Ying Ngoh
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Boon Wee Teo
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Anantharaman Vathsala
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Benjamin Yen Seow Goh
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Clement Hsiang Rong Yong
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Lata Raman
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore
| | - Ho Yee Tiong
- National University Centre for Organ Transplantation, National University Hospital, Singapore, Singapore.
| |
Collapse
|
6
|
Liu Y, Huang Z, Chen Y, Liao B, Luo D, Gao X, Wang K, Li H. Staplers or clips?: A systematic review and meta-analysis of vessel controlling devices for renal pedicle ligation in laparoscopic live donor nephrectomy. Medicine (Baltimore) 2018; 97:e13116. [PMID: 30407327 PMCID: PMC6250510 DOI: 10.1097/md.0000000000013116] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Controlling of the renal vessels is a critical step in live donor nephrectomy (LDN). Currently, mainly 2 devices, Hem-o-Lok clips and staplers, are utilized to control vessels during LDN. Both of them have advantages and disadvantages. METHODS This systematic review and meta-analysis was aimed to compare the safety and the efficacy of the 2 devices and to identify the better one in LDN. A systematic search for related publications in the databases of PubMed, Medline, Embase, the Cochrane Library, and Web of Science through February 2018 was performed. Eight studies were selected and evaluated with the Newcastle-Ottawa Scale (NOS). RESULTS The meta-analysis result showed that utilization of Hem-o-Lok clips resulted in greater amount of estimated blood loss (mean differences [MD]: 40.10; 95% confidence interval [CI] 4.37-75.84) and longer time of warm ischemia (WIT) (MD: 55.61; 95% CI 36.79-74.43) than using staplers. Residual vascular length of grafts in clip group was longer than that in stapler group (MD: 2.51; 95% CI 0.78-4.24). However, the differences in primary outcomes such as device failure rate, death rate, and severe hemorrhage rate, were not significant between these 2 groups. In addition, utilization of Hem-o-Lok clips costed approximate $400 lower than staplers per patient. CONCLUSION This study revealed that Hem-o-Lok clips and staplers have the similar function in LDN renal ligation, regarding the device failure rate, death rate, and severe hemorrhage rate. However, the surgeons would benefit from the clips in terms of the residue length of vessels, these outstanding features provide operation convenience and flexibility, such as right-sided donor nephrectomies, early vascular bifurcation, and rare vascular variation. In addition, the clips have potential economic advantages. In some developing countries, it would reduce the healthcare expenditure.
Collapse
|
7
|
Tay WK, Kesavan A, Goh YSB, Tiong HY. Right Living Donor Nephrectomies: Retroperitoneoscopic vs Laparoscopic Transperitoneal Approach. Transplant Proc 2018; 50:2333-2337. [PMID: 30316353 DOI: 10.1016/j.transproceed.2018.03.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 03/06/2018] [Indexed: 11/15/2022]
Abstract
Retroperitoneoscopic right living donor nephrectomy (RLDN) provides direct access to the renal hilum without the need to mobilize the colon. However, factors such as lack of anatomic landmarks to guide orientation, smaller working space, and steep learning curve provided a debate against this approach. In this retrospective study, we reviewed our single-center experience of retroperitoneoscopic RLDN. MATERIALS AND METHODS Between January 2015 and January 2017, 10 patients underwent retroperitoneoscopic RLDN by a single surgeon at the National University Hospital, Singapore. Baseline demographics, intraoperative parameters, and both donor and recipient outcomes were retrieved from the database. RESULTS Mean (SD) age was 52.7 (13.8) years, mean (SD) body mass index was 25.2 (2.9) kg/m2, mean (SD) operating time was 196.8 (38.0) minutes, mean (SD) warm ischemic time was 5.1 (2.1) minutes, and mean (SD) blood loss was 43 (25.0) mL. Mean (SD) renal vein length was 10 (2.5) mm, and mean (SD) renal artery length was 6 (1.8 mm). One patient had to be converted to laparoscopic transperitoneal nephrectomy. No donors developed complications. Mean (SD) hospital stay was 3.5 (1.1) days. All transplanted right kidneys had immediate graft function with no complications. Mean (SD) serum creatinine (at 1 year) was 103.6 (20.3) μmol/L. There is no graft loss among the recipient after 1 year. CONCLUSIONS Right donor nephrectomy can be performed safely using retroperitoneoscopic approach. Retroperitoneoscopy offers advantages, especially in a patient who previously had transabdominal surgery or high body mass index. However, transperitoneal approach may be preferable in anomalous situations because it provides instinctive orientation from anatomic landmarks and a greater working space.
Collapse
Affiliation(s)
- W K Tay
- Department of Urology, National University Hospital, Singapore
| | - A Kesavan
- Department of Urology, National University Hospital, Singapore
| | - Y S B Goh
- Department of Urology, National University Hospital, Singapore
| | - H Y Tiong
- Department of Urology, National University Hospital, Singapore.
| |
Collapse
|
8
|
Tourinho-Barbosa RR, Tobias-Machado M, Castro-Alfaro A, Ogaya-Pinies G, Cathelineau X, Sanchez-Salas R. Complications in robotic urological surgeries and how to avoid them: A systematic review. Arab J Urol 2017; 16:285-292. [PMID: 30140463 PMCID: PMC6104661 DOI: 10.1016/j.aju.2017.11.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/26/2017] [Accepted: 11/08/2017] [Indexed: 01/16/2023] Open
Abstract
Objectives To review the main complications related to the robot-assisted laparoscopic (RAL) approach in urology and to suggest measures to avoid such issues. Methods A systematic search for articles of the contemporary literature was performed in PubMed database for complications in RAL urological procedures focused on positioning, access, and operative technique considerations. Each complication topic is followed by recommendations about how to avoid it. Results In all, 40 of 253 articles were included in this analysis. Several complications in RAL procedures can be avoided if the surgical team follows some key steps. Adequate patient positioning must avoid skin, peripheral nerve, and muscles injuries, and ocular and cognitive complications mainly related to steep Trendelenburg positioning in pelvic procedures. Port-site access and closure should not be neglected during minimally invasive procedures as these complications although rare can be troublesome. Technique-related complications depend on surgeon experience and the early learning curve should be monitored. Conclusions Adequate patient selection, surgical positioning, mentorship training, and avoiding long-lasting procedures are essential to prevent RAL-related complications. The robotic surgical team must be careful and work together to avoid possible complications. This review offers several steps in surgical planning to reach this goal.
Collapse
Affiliation(s)
- Rafael Rocha Tourinho-Barbosa
- Department of Urology, L'Institut Mutualiste Montsouris, Université Paris-Descartes, Paris, France.,Division of Urology, ABC Medical School, Sao Paulo, Brazil
| | | | - Adalberto Castro-Alfaro
- Department of Urology, L'Institut Mutualiste Montsouris, Université Paris-Descartes, Paris, France
| | - Gabriel Ogaya-Pinies
- Department of Urology, University of Central Florida College of Medicine and Global Robotics Institute, Florida Hospital-Celebration Health, FL, USA
| | - Xavier Cathelineau
- Department of Urology, L'Institut Mutualiste Montsouris, Université Paris-Descartes, Paris, France
| | - Rafael Sanchez-Salas
- Department of Urology, L'Institut Mutualiste Montsouris, Université Paris-Descartes, Paris, France
| |
Collapse
|
9
|
Han X, Lim JYM, Raman L, Tai BC, Kaur H, Goh ATH, Vathsala A, Tiong HY. Nephrectomy-induced reduced renal function and the health-related quality of life of living kidney donors. Clin Transplant 2017; 31. [PMID: 28083977 DOI: 10.1111/ctr.12910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2017] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the health impact of nephrectomy on living kidney donors (LKDs) by comparing the health-related quality of life (HrQOL) scores measured by Short Form-36 (SF36) between those with and without postdonation renal function impairment (PRFI). METHODS Eighty-two LKDs (47 females, mean age=50.2±11.2 years) were prospectively recruited to participate in a SF-36 HrQOL survey. Chart review, individual baseline, and postoperative renal function (eGFR) was determined using the Modification of Diet in Renal Disease formula. PRFI was defined as eGFR<60 mL/min/1.73 m2 or proteinuria. Mean SF-36 domain scores were compared between those with and without PRFI. RESULTS After a median follow-up of 5.7 years, the prevalence of postdonation comorbidities was 29.3% (n=24) PRFI, 25.6% (n=21) hypertension, 6.1% (n=5) diabetes, and 3.7% (n=3) heart disease, and no LKDs developed end-stage renal disease. Mean eGFR before and after donor nephrectomy was 95.5±23.4 and 71.0±17.3 mL/min/1.73 m2 (P<.01). Mean SF-36 scores of LKDs were not significantly different between those with and without PRFI in all the domains (all P>.05). Similarly, the proportion of LKDs with PRFI did not differ significantly between the patients with SF-36 domain scores above and below the published reference values. CONCLUSION Nephrectomy-induced PRFI may not have a significant impact on the HrQOL of the LKD population with a low proportion of other major comorbidities such as diabetes and ischemic heart disease.
Collapse
Affiliation(s)
- Xiao Han
- Department of Urology, National University Hospital, National University Health System, Singapore, Singapore
| | - Joel Yu Ming Lim
- Department of Urology, National University Hospital, National University Health System, Singapore, Singapore
| | - Lata Raman
- Department of Urology, National University Hospital, National University Health System, Singapore, Singapore
| | - Bee Choo Tai
- Saw Swee Hock School of Public Health, National University Hospital, National University Health System, Singapore, Singapore
| | - Hersharan Kaur
- Department of Nephrology, National University Hospital, National University Health System, Singapore, Singapore
| | - Angeline Ting Hui Goh
- Department of Nephrology, National University Hospital, National University Health System, Singapore, Singapore
| | - Anantharaman Vathsala
- Department of Nephrology, National University Hospital, National University Health System, Singapore, Singapore
| | - Ho Yee Tiong
- Department of Urology, National University Hospital, National University Health System, Singapore, Singapore
| |
Collapse
|