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Le LTH, Tran TT, Duong TV, Dang LT, Hoang TA, Nguyen DH, Pham MD, Do BN, Nguyen HC, Pham LV, Nguyen LTH, Nguyen HT, Trieu NT, Do TV, Trinh MV, Ha TH, Phan DT, Nguyen TTP, Nguyen KT, Yang SH. Digital Healthy Diet Literacy and Fear of COVID-19 as Associated with Treatment Adherence and Its Subscales among Hemodialysis Patients: A Multi-Hospital Study. Nutrients 2023; 15:nu15102292. [PMID: 37242175 DOI: 10.3390/nu15102292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Treatment adherence (TA) is a critical issue and is under-investigated in hemodialysis patients. A multi-center study was conducted from July 2020 to March 2021 on 972 hemodialysis patients in eight hospitals in Vietnam to explore the factors associated with TA during the COVID-19 pandemic. Data were collected, including socio-demographics, an End-Stage Renal Disease Adherence Questionnaire (ESRD-AQ), 12-item short-form health literacy questionnaire (HLS-SF12), 4-item digital healthy diet literacy scale (DDL), 10-item hemodialysis dietary knowledge scale (HDK), 7-item fear of COVID-19 scale (FCoV-19S), and suspected COVID-19 symptoms (S-COVID19-S). Bivariate and multivariate linear regression models were used to explore the associations. Higher DDL scores were associated with higher TA scores (regression coefficient, B, 1.35; 95% confidence interval, 95%CI, 0.59, 2.12; p = 0.001). Higher FCoV-19S scores were associated with lower TA scores (B, -1.78; 95%CI, -3.33, -0.24; p = 0.023). In addition, patients aged 60-85 (B, 24.85; 95%CI, 6.61, 43.11; p = 0.008) with "very or fairly easy" medication payment ability (B, 27.92; 95%CI, 5.89, 44.95; p = 0.013) had higher TA scores. Patients who underwent hemodialysis for ≥5 years had a lower TA score than those who received <5 years of hemodialysis (B, -52.87; 95%CI, -70.46, -35.28; p < 0.001). These findings suggested that DDL and FCoV-19S, among other factors, should be considered in future interventions to improve TA in hemodialysis patients.
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Affiliation(s)
- Lan T H Le
- Training and Direction of Healthcare Activity Center, Thai Nguyen National Hospital, Thai Nguyen City 241-24, Vietnam
- Biochemistry Department, Thai Nguyen National Hospital, Thai Nguyen City 241-24, Vietnam
- Director Office, Thai Nguyen National Hospital, Thai Nguyen City 241-24, Vietnam
| | - Tu T Tran
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei 110-31, Taiwan
- Department of Internal Medicine, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen 241-17, Vietnam
| | - Tuyen Van Duong
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan
| | - Loan T Dang
- Faculty of Nursing and Midwifery, Hanoi Medical University, Hanoi 115-20, Vietnam
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 112-19, Taiwan
| | - Trung A Hoang
- Hemodialysis Department, Nephro-Urology-Dialysis Center, Bach Mai Hospital, Hanoi 115-19, Vietnam
| | - Dung H Nguyen
- Hemodialysis Department, Nephro-Urology-Dialysis Center, Bach Mai Hospital, Hanoi 115-19, Vietnam
| | - Minh D Pham
- Department of Nutrition, Military Hospital 103, Hanoi 121-08, Vietnam
- Department of Nutrition, Vietnam Military Medical University, Hanoi 121-08, Vietnam
| | - Binh N Do
- Department of Military Science, Vietnam Military Medical University, Hanoi 121-08, Vietnam
- Department of Infectious Diseases, Vietnam Military Medical University, Hanoi 121-08, Vietnam
| | - Hoang C Nguyen
- Director Office, Thai Nguyen National Hospital, Thai Nguyen City 241-24, Vietnam
- President Office, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen City 241-17, Vietnam
| | - Linh V Pham
- Department of Pulmonary & Cardiovascular Diseases, Hai Phong University of Medicine and Pharmacy Hospital, Hai Phong 042-12, Vietnam
- President Office, Hai Phong University of Medicine and Pharmacy, Hai Phong 042-12, Vietnam
| | - Lien T H Nguyen
- Department of Pulmonary & Cardiovascular Diseases, Hai Phong University of Medicine and Pharmacy Hospital, Hai Phong 042-12, Vietnam
| | - Hoi T Nguyen
- Director Office, Hai Phong International Hospital, Hai Phong 047-08, Vietnam
| | - Nga T Trieu
- Hemodialysis Division, Hai Phong International Hospital, Hai Phong 047-08, Vietnam
| | - Thinh V Do
- Director Office, Bai Chay Hospital, Ha Long 011-21, Vietnam
| | - Manh V Trinh
- Director Office, Quang Ninh General Hospital, Ha Long 011-08, Vietnam
| | - Tung H Ha
- Director Office, General Hospital of Agricultural, Hanoi 125-16, Vietnam
| | - Dung T Phan
- Faculty of Nursing, Hanoi University of Business and Technology, Hanoi 116-22, Vietnam
- Nursing Office, Thien An Obstetrics and Gynecology Hospital, Hanoi 112-06, Vietnam
| | - Thao T P Nguyen
- Institute for Community Health Research, University of Medicine and Pharmacy, Hue University, Hue 491-20, Vietnam
| | - Kien T Nguyen
- Department of Health Promotion, Faculty of Social and Behavioral Sciences, Hanoi University of Public Health, Hanoi 119-10, Vietnam
| | - Shwu-Huey Yang
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 110-31, Taiwan
- Research Center of Geriatric Nutrition, Taipei Medical University, Taipei 110-31, Taiwan
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Dang LT, Luong TC, Nguyen DH, Hoang TA, Nguyen HT, Nguyen HC, Duong TH, Tran TT, Pham LV, Ngo TV, Nguyen HT, Trieu NT, Do TV, Trinh MV, Ha TH, Phan DT, Do BN, Yang SH, Wang TJ, Duong TV. The Associations of Suspected COVID-19 Symptoms with Anxiety and Depression as Modified by Hemodialysis Dietary Knowledge: A Multi-Dialysis Center Study. Nutrients 2022; 14:nu14122364. [PMID: 35745093 PMCID: PMC9230868 DOI: 10.3390/nu14122364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/22/2022] [Accepted: 06/02/2022] [Indexed: 02/06/2023] Open
Abstract
During the COVID-19 pandemic, it is essential to evaluate hemodialysis patients’ dietary knowledge, especially among those with COVID-19 related symptoms, in order to identify appropriate strategies in managing their mental health. The study’s purposes were to test the psychometric properties of the hemodialysis dietary knowledge (HDK) scale, and to investigate the modifying impact of HDK on the associations of suspected COVID-19 symptoms (S-COVID-19-S) with anxiety and depression among hemodialysis patients. A cross-sectional study was conducted from July 2020 to March 2021 at eight hospitals across Vietnam. Data of 875 hemodialysis patients were analyzed, including socio-demographic, anxiety (the generalized anxiety disorder scale, GAD-7), depression (the patient health questionnaire, PHQ-9), S-COVID-19-S, HDK, health literacy, and digital healthy diet literacy. Confirmatory factor analysis (CFA) and logistic regression models were used to analyze the data. The HDK scale demonstrates the satisfactory construct validity with good model fit (Goodness of Fit Index, GFI = 0.96; Adjusted Goodness of Fit Index, AGFI = 0.90; Standardized Root Mean Square Residual, SRMR = 0.05; Root Mean Square Error of Approximation, RMSEA = 0.09; Normed Fit Index, NFI = 0.96; Comparative Fit Index, CFI = 0.96, and Parsimony goodness of Fit Index, PGFI = 0.43), criterion validity (as correlated with HL (r = 0.22, p < 0.01) and DDL (r = 0.19, p < 0.01), and reliability (Cronbach alpha = 0.70)). In the multivariate analysis, S-COVID-19-S was associated with a higher likelihood of anxiety (odds ratio, OR, 20.76; 95% confidence interval, 95%CI, 8.85, 48.70; p < 0.001) and depression (OR, 12.95; 95%CI, 6.67, 25.14, p < 0.001). A higher HDK score was associated with a lower likelihood of anxiety (OR, 0.70; 95%CI, 0.64, 0.77; p < 0.001) and depression (OR, 0.72; 95%CI, 0.66, 0.79; p < 0.001). In the interaction analysis, the negative impacts of S-COVID-19-S on anxiety and depression were mitigated by higher HDK scores (p < 0.001). In conclusion, HDK is a valid and reliable tool to measure dietary knowledge in hemodialysis patients. Higher HDK scores potentially protect patients with S-COVID-19-S from anxiety and depression during the pandemic.
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Affiliation(s)
- Loan T. Dang
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 112-19, Taiwan;
- Faculty of Nursing and Midwifery, Hanoi Medical University, Hanoi 115-20, Vietnam
| | - Thuc C. Luong
- Director Office, Military Hospital 103, Hanoi 121-08, Vietnam;
- Department of Cardiology, Cardiovascular Center, Military Hospital 103, Hanoi 121-08, Vietnam
| | - Dung H. Nguyen
- Hemodialysis Department, Nephro-Urology-Dialysis Center, Bach Mai Hospital, Hanoi 115-19, Vietnam; (D.H.N.); (T.A.H.)
| | - Trung A. Hoang
- Hemodialysis Department, Nephro-Urology-Dialysis Center, Bach Mai Hospital, Hanoi 115-19, Vietnam; (D.H.N.); (T.A.H.)
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei 110-31, Taiwan;
| | - Hoai T. Nguyen
- Division of Military Scientific Information, Vietnam Military Medical University, Hanoi 121-08, Vietnam;
| | - Hoang C. Nguyen
- Director Office, Thai Nguyen National Hospital, Thai Nguyen 241-24, Vietnam; (H.C.N.); (T.H.D.)
- President Office, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen 241-17, Vietnam
| | - Thai H. Duong
- Director Office, Thai Nguyen National Hospital, Thai Nguyen 241-24, Vietnam; (H.C.N.); (T.H.D.)
- Department of Internal Medicine, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen 241-17, Vietnam
| | - Tu T. Tran
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei 110-31, Taiwan;
- Department of Internal Medicine, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen 241-17, Vietnam
| | - Linh V. Pham
- Department of Pulmonary & Cardiovascular Diseases, Hai Phong University of Medicine and Pharmacy Hospital, Hai Phong 042-12, Vietnam;
| | - Tuan V. Ngo
- Department of Hemodialysis, Hai Phong University of Medicine and Pharmacy Hospital, Hai Phong 042-12, Vietnam;
| | - Hoi T. Nguyen
- Director Office, Hai Phong International Hospital, Hai Phong 047-08, Vietnam;
| | - Nga T. Trieu
- Hemodialysis Division, Hai Phong International Hospital, Hai Phong 047-08, Vietnam;
| | - Thinh V. Do
- Director Office, Bai Chay Hospital, Ha Long 011-21, Vietnam;
| | - Manh V. Trinh
- Director Office, Quang Ninh General Hospital, Ha Long 011-08, Vietnam;
| | - Tung H. Ha
- Director Office, General Hospital of Agricultural, Hanoi 125-16, Vietnam;
| | - Dung T. Phan
- Faculty of Nursing, Hanoi University of Business and Technology, Hanoi 116-22, Vietnam;
- Nursing Office, Thien An Obstetrics and Gynecology Hospital, Hanoi 112-06, Vietnam
| | - Binh N. Do
- Department of Infectious Diseases, Vietnam Military Medical University, Hanoi 121-08, Vietnam;
- Division of Military Science, Military Hospital 103, Hanoi 121-08, Vietnam
| | - Shwu-Huey Yang
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan;
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 110-31, Taiwan
- Research Center of Geriatric Nutrition, Taipei Medical University, Taipei 110-31, Taiwan
| | - Tsae-Jyy Wang
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 112-19, Taiwan;
- Correspondence: (T.-J.W.); (T.V.D.); Tel.: +886-2-2822-7101 (ext. 3118) (T.-J.W.); +886-2-2736-1661 (ext. 6545) (T.V.D.)
| | - Tuyen Van Duong
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110-31, Taiwan;
- Correspondence: (T.-J.W.); (T.V.D.); Tel.: +886-2-2822-7101 (ext. 3118) (T.-J.W.); +886-2-2736-1661 (ext. 6545) (T.V.D.)
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Raji CA, Eyre H, Wei SH, Bredesen DE, Moylan S, Law M, Small G, Thompson PM, Friedlander RM, Silverman DH, Baune BT, Hoang TA, Salamon N, Toga AW, Vernooij MW. Hot Topics in Research: Preventive Neuroradiology in Brain Aging and Cognitive Decline. AJNR Am J Neuroradiol 2015; 36:1803-9. [PMID: 26045577 DOI: 10.3174/ajnr.a4409] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 02/23/2015] [Indexed: 01/26/2023]
Abstract
Preventive neuroradiology is a new concept supported by growing literature. The main rationale of preventive neuroradiology is the application of multimodal brain imaging toward early and subclinical detection of brain disease and subsequent preventive actions through identification of modifiable risk factors. An insightful example of this is in the area of age-related cognitive decline, mild cognitive impairment, and dementia with potentially modifiable risk factors such as obesity, diet, sleep, hypertension, diabetes, depression, supplementation, smoking, and physical activity. In studying this link between lifestyle and cognitive decline, brain imaging markers may be instrumental as quantitative measures or even indicators of early disease. The purpose of this article is to provide an overview of the major studies reflecting how lifestyle factors affect the brain and cognition aging. In this hot topics review, we will specifically focus on obesity and physical activity.
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Affiliation(s)
- C A Raji
- From the Departments of Radiology (C.A.R., S.H.W., T.A.H., N.S.)
| | - H Eyre
- Psychiatry (H.E., G.S.) Discipline of Psychiatry (H.E., B.T.B.), University of Adelaide, Adelaide, South Australia, Australia
| | - S H Wei
- From the Departments of Radiology (C.A.R., S.H.W., T.A.H., N.S.)
| | | | - S Moylan
- School of Medicine (S.M.), Deakin University, Geelong, Victoria, Australia
| | - M Law
- Department of Radiology (M.L.)
| | | | - P M Thompson
- Laboratory of Neuroimaging (P.M.T., A.W.T.), University of Southern California, Los Angeles, California
| | - R M Friedlander
- Department of Neurosurgery (R.M.F.), University of Pittsburgh, Pittsburgh, Pennsylvania
| | - D H Silverman
- Nuclear Medicine (D.H.S.), University of California at Los Angeles Medical Center, University of California at Los Angeles, Los Angeles, California
| | - B T Baune
- Discipline of Psychiatry (H.E., B.T.B.), University of Adelaide, Adelaide, South Australia, Australia
| | - T A Hoang
- From the Departments of Radiology (C.A.R., S.H.W., T.A.H., N.S.)
| | - N Salamon
- From the Departments of Radiology (C.A.R., S.H.W., T.A.H., N.S.)
| | - A W Toga
- Laboratory of Neuroimaging (P.M.T., A.W.T.), University of Southern California, Los Angeles, California
| | - M W Vernooij
- Departments of Radiology and Epidemiology (M.W.V.), Erasmus University Medical Center, Rotterdam, the Netherlands
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Abstract
Early neonatal handling of rat pups produces dampened hypothalamic-pituitary-adrenal axis reactivity to stress in adult male offspring. However, less is known about whether there is a similar effect for females. Although, most studies of neonatal handling have examined subsequent effects during adulthood, adolescence is an important developmental stage for stress responsivity. To address these issues, the effect of neonatal handling on the endocrine stress response and brain activity of male and female rats was determined in response to acute restraint stress during adolescence. Consistent with previous findings in adult males, neonatal handling reduced restraint stress-induced hormone levels in adolescent males. However, in contrast, we found elevated plasma hormone concentrations in handled females. A gender-specific handling effect on brain activity was also evident, with significantly increased stress-induced activation of the posterior cingulate cortex of handled females, as measured by c-fos mRNA expression. The striking gender difference in the effect of early neonatal handling provides evidence that this must be considered as an important variable in subsequent stress responsivity induced by early manipulations.
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Affiliation(s)
- M K Park
- Department of Pharmacology, College of Medicine and Transdisciplinary Tobacco Use Research Center, University of California, Irvine, CA 92697, USA.
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Habash MB, Beaudette LA, Cassidy MB, Leung KT, Hoang TA, Vogel HJ, Trevors JT, Lee H. Characterization of tetrachlorohydroquinone reductive dehalogenase from Sphingomonas sp. UG30. Biochem Biophys Res Commun 2002; 299:634-40. [PMID: 12459186 DOI: 10.1016/s0006-291x(02)02711-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Tetrachlorohydroquinone reductive dehalogenase (PcpC) is the second of three enzymes that catalyze the initial degradation of pentachlorophenol in Sphingomonas sp. UG30 and several other bacterial strains. The UG30 PcpC shares a high degree (94%) of primary sequence identity with the well-studied PcpC from Sphingobium chlorophenolicum ATCC 39723. Significant differences, however, were observed between the two PcpC enzymes in some of their functional and kinetic properties. The temperature optimum of the UG30 PcpC is 10 degrees C higher and the pH optimum is approximately 2 units higher than the S. chlorophenolicum PcpC. In addition, the S. chlorophenolicum PcpC is subject to inhibition by the substrate tetrachlorohydroquinone (TCHQ), and this has necessitated the use of a mutant enzyme, which was not inhibited by TCHQ, for kinetic studies. In contrast, the UG30 PcpC was not inhibited by TCHQ and this may allow detailed kinetic and mechanistic studies using the wild-type enzyme.
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Affiliation(s)
- M B Habash
- Department of Environmental Biology, University of Guelph, Guelph, Ont., Canada N1G 2W1
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Guzek JP, Ching AS, Hoang TA, Dure-Smith P, Llaurado JG, Yau DC, Stephenson CB, Stephenson CM, Elam DA. Clinical and radiologic lacrimal testing in patients with epiphora. Ophthalmology 1997; 104:1875-81. [PMID: 9373120 DOI: 10.1016/s0161-6420(97)30013-x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE The purpose of the study is to assess the strengths and weaknesses of selected clinical and radiologic lacrimal tests in patients with epiphora. DESIGN The study design was a prospective clinical trial. PARTICIPANTS Fifteen patients with epiphora (N = 27 eyes) were studied. METHODS All patients underwent Jones testing, the dye disappearance test, canalicular probing, lacrimal scintigraphy, and macrodacryocystography. MAIN OUTCOME MEASURES The dye disappearance test was graded individually by three ophthalmologists. Lacrimal scintigraphy and macrodacryocystography were evaluated by a nuclear medicine specialist and a radiologist, respectively. A panel of three ophthalmologists evaluated the data using a scoring system that relied on the preponderance of evidence to arrive at a final assessment. RESULTS When the Jones I test results were negative (dye recovered from the nose), the epiphora was always from hypersecretion. When the Jones I test results were positive (no dye recovered from the nose), obstruction was not always present. When the dye disappearance test results were strongly abnormal, obstruction was always present. In contrast, when the dye disappearance test results were normal, the lacrimal drainage system was not always patent. Canalicular probing was more reliable than scintigraphy in identifying canalicular obstruction. Marked stenosis of the sac or duct on dacryocystography essentially confirmed nasolacrimal outflow obstruction; however, with the authors' technique, a normal study was found in some patients with functional or partial obstruction. CONCLUSIONS More than one lacrimal test may be required for a definitive diagnosis in patients with epiphora due to partial or functional nasolacrimal outflow obstruction.
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Affiliation(s)
- J P Guzek
- Department of Ophthalmology, Jerry L. Pettis Memorial VA Medical Center, Loma Linda, California 92357, USA
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Hoang TA, Hasso AN. Intracranial vascular malformations. Neuroimaging Clin N Am 1994; 4:823-47. [PMID: 7858922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Magnetic resonance imaging is a useful process in the evaluation and follow-up examination of intracranial vascular malformations. Magnetic resonance imaging as related to the four subtypes of these malformations, arteriovenous malformations, venous angiomas, cavernous malformations, and capillary telangiectasis, is discussed.
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Affiliation(s)
- T A Hoang
- Jerry L. Pettis Memorial Veterans Hospital, Loma Linda, California
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Affiliation(s)
- T A Hoang
- Department of Diagnostic Radiology, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212-9986
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Nguyen TH, Hoang TA, Dash N, Christlieb I, Lupetin AR, Beckman I, Schapiro RL, Magovern GJ. Latissimus dorsi cardiomyoplasty: radiographic findings. AJR Am J Roentgenol 1988; 150:545-7. [PMID: 3257606 DOI: 10.2214/ajr.150.3.545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Left latissimus dorsi muscle cardiomyoplasty is a surgical procedure in which the muscle is mobilized as a pedicled flap, moved into the left pleural and mediastinal cavities, and used for surgical repair and/or mechanical augmentation of a failing left ventricle. Chest radiographs in four patients who had undergone this procedure were evaluated. In all four patients, there was bandlike or diffuse increase in density in the left midhemithorax with loss of the left heart border. These findings, which could be misinterpreted as lung disease, represent the transposed muscle flap. CT showed the exact anatomic position of the flap in relation to the intrathoracic structures. Familiarity with the postoperative radiographic appearance of this type of myoplasty is important to avoid misinterpretation.
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Affiliation(s)
- T H Nguyen
- Department of Diagnostic Radiology, Allegheny General Hospital, Pittsburgh, PA 15212-9986
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