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The impact of socio-demographic factors on the survival of cancer patients in Zimbabwe. Sci Rep 2021; 11:12309. [PMID: 34112895 PMCID: PMC8192745 DOI: 10.1038/s41598-021-91781-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/27/2021] [Indexed: 11/09/2022] Open
Abstract
We provide a survival analysis of cancer patients in Zimbabwe. Our results show that young cancer patients have lower but not significant hazard rate compared to old cancer patients. Male cancer patients have lower but not significant hazard rate compared to female cancer patients. Race and marital status are significant risk factors for cancer patients in Zimbabwe.
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Madiba T, Moodley Y, Sartorius B, Sartorius K, Aldous C, Naidoo M, Govindasamy V, Bhadree S, Stopforth L, Ning Y, Kiran PR. Clinicopathological spectrum of colorectal cancer among the population of the KwaZulu-Natal Province in South Africa. Pan Afr Med J 2020; 37:74. [PMID: 33244337 PMCID: PMC7680225 DOI: 10.11604/pamj.2020.37.74.21313] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 07/13/2020] [Indexed: 12/18/2022] Open
Abstract
Introduction the burden of colorectal carcinoma (CRC), once considered rare in Africa, may be changing with the disease being increasingly diagnosed and there is a suggestion that age and race influence tumour behaviour. We sought to describe the clinicopathological spectrum of CRC among the different race and age groups in a South African setting. Methods analysis of prospectively collected data from an on-going colorectal cancer database, including demographics, clinical presentation, site, staging and grading on all patients enrolled over an 18-year period. Results a total of 2232 patients with CRC were accrued over the study period (Africans, 798; Indians, 890; Coloureds, 104; and Whites, 440). Mean age was 57.7 (SD 14.4) but varied considerably by race (p < 0.001) with Africans being significantly younger. Young adults (aged < 40 years) totalled 305 and older patients (aged > 40 years) totalled 1927. The proportion of young patients (< 40 years old) was 28%, 7%, 9% and 3% among Africans, Indian, Coloured and White patients respectively. There were minimal variations in anatomical sub-site distribution. There was no difference in tumour stage between the various races and between older and young adults. Mucinous differentiation was more common in Africans and in young patients and poor differentiation was more common in African patients. Africans had a significantly lower resection rate compared to the other race groups (p < 0.001). Younger patients had a significantly lower resection rate compared to the older age group (p < 0.001). Conclusion African patients were the youngest compared to the other race groups. Mucinous differentiation predominated in Africans and young adults. Poor differentiation predominated in Africans. Resection rate was lower for African patients and in young patients.
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Affiliation(s)
- Thandinkosi Madiba
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | - Yoshan Moodley
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa.,Faculty of Health and Environmental Sciences, Central University of Technology, Bloemfontein, South Africa
| | - Benn Sartorius
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa.,London School of Hygiene and Tropical Medicine, London, UK
| | - Kurt Sartorius
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | - Colleen Aldous
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | - Maseelan Naidoo
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | - Vishendran Govindasamy
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa
| | - Shona Bhadree
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa.,Department of Radiation and Oncology, University of KwaZulu-Natal, Durban, South Africa
| | - Laura Stopforth
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa.,Department of Radiation and Oncology, University of KwaZulu-Natal, Durban, South Africa
| | - Yuming Ning
- Columbia University Medical Centre and Mailman School of Public Health, New York, USA
| | - Pokala Ravi Kiran
- Gastrointestinal Cancer Research Group, Department of Surgery, University of KwaZulu-Natal, Durban, South Africa.,Columbia University Medical Centre and Mailman School of Public Health, New York, USA
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Molecular Aspects of Colorectal Adenomas: The Interplay among Microenvironment, Oxidative Stress, and Predisposition. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1726309. [PMID: 32258104 PMCID: PMC7102468 DOI: 10.1155/2020/1726309] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 12/23/2019] [Accepted: 12/30/2019] [Indexed: 12/11/2022]
Abstract
The development of colorectal cancer (CRC) is a multistep process initiated by a benign polyp that has the potential to evolve into in situ carcinoma through the interactions between environmental and genetic factors. CRC incidence rates are constantly increased for young adult patients presenting an advanced tumor stage. The majority of CRCs arise from colonic adenomas originating from aberrant cell proliferation of colon epithelium. Endoscopic polypectomy represents a tool for early detection and removal of polyps, although the occurrence of cancers after negative colonoscopy shows a significant incidence. It has long been recognized that the aberrant regulation of Wingless/It (Wnt)/β-Catenin signaling in the pathogenesis of colorectal cancer is supported by its critical role in the differentiation of stem cells in intestinal crypts and in the maintenance of intestinal homeostasis. For this review, we will focus on the development of adenomatous polyps through the interplay between renewal signaling in the colon epithelium and reactive oxygen species (ROS) production. The current knowledge of molecular pathology allows us to deepen the relationships between oxidative stress and other risk factors as lifestyle, microbiota, and predisposition. We underline that the chronic inflammation and ROS production in the colon epithelium can impair the Wnt/β-catenin and/or base excision repair (BER) pathways and predispose to polyp development. In fact, the coexistence of oxidative DNA damage and errors in DNA polymerase can foster C>T transitions in various types of cancer and adenomas, leading to a hypermutated phenotype of tumor cells. Moreover, the function of Adenomatous Polyposis Coli (APC) protein in regulating DNA repair is very important as therapeutic implication making DNA damaging chemotherapeutic agents more effective in CRC cells that tend to accumulate mutations. Additional studies will determine whether approaches based on Wnt inhibition would provide long-term therapeutic value in CRC, but it is clear that APC disruption plays a central role in driving and maintaining tumorigenesis.
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Kayamba V, Nicholls K, Morgan C, Kelly P. A seven-year retrospective review of colonoscopy records from a single centre in Zambia. Malawi Med J 2018; 30:17-21. [PMID: 29868154 PMCID: PMC5974381 DOI: 10.4314/mmj.v30i1.4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Introduction Colorectal disease is common throughout the world, but the spectrum of diagnoses across Africa remains largely unexplored. There is anecdotal evidence of changing colorectal disease but this has not been systematically investigated. The aim of this study was to enhance our insight into the spectrum of colonoscopic diagnoses in Zambia. Methods We retrieved written colonoscopy reports from January 2008 to December 2015. Collected data were coded by experienced endoscopists and analysed by age, sex, referral source, indication and diagnosis. Results Included in this analysis were 573 colonoscopy reports. The most common diagnosis was haemorrhoids (n=151, 26%), followed by tumours (n=96,17%). Over this time period, the proportion of normal colonoscopies decreased by 32% (P<0.001), presumably due to introduction of screening of all requests, while the rate of polyp detection increased from 5% to 10% (P=0.006). The detection of polyps was highest in patients less than 16 years (OR 8.4; 95% CI 2.4–26.2, P<0.001). Of those with colorectal tumours, 33/96 (35%) were less than 45 years although the occurrence was higher with advancing age (P=0.02). Diverticular disease was more common in older age groups (median (IQR) age 70 (60–75) years, versus 47 (34–62) years for those without the disease; P=0.0001). Conclusion This audit has shown that more than a third of colorectal tumours seen during colonoscopy are in patients below the age of 45 years, with the occurrence of polyps being highest in those below 16 years. Diverticular disease is most common in older age groups.
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Affiliation(s)
- Violet Kayamba
- Tropical Gastroenterology & Nutrition group, University of Zambia School of Medicine, Nationalist Road, Lusaka, Zambia
| | - Kate Nicholls
- Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London E1 2AT, United Kingdom
| | - Catrin Morgan
- Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London E1 2AT, United Kingdom
| | - Paul Kelly
- Tropical Gastroenterology & Nutrition group, University of Zambia School of Medicine, Nationalist Road, Lusaka, Zambia.,Blizard Institute, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London E1 2AT, United Kingdom
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Bebington B, Singh E, Fabian J, Jan Kruger C, Prodehl L, Surridge D, Penny C, McNamara L, Ruff P. Design and methodology of a study on colorectal cancer in Johannesburg, South Africa. JGH OPEN 2018; 2:139-143. [PMID: 30483579 PMCID: PMC6152464 DOI: 10.1002/jgh3.12061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/27/2017] [Accepted: 04/02/2018] [Indexed: 12/29/2022]
Abstract
Background and Aim Cancer is one of the foremost causes of morbidity and mortality worldwide. Globally, colorectal cancer (CRC) is the third most diagnosed and fourth most important cause of cancer death. A total of 70% of all CRC‐related deaths occur in low‐ and middle‐income countries. In Sub‐Saharan Africa (SSA), estimating the burden of CRC is difficult. Only 27 of 43 SSA countries have formalized cancer registration systems; data quality is variable and national coverage rare. Methods This is a multidisciplinary, longitudinal cohort study started in January 2016. Patients >18 years with histologically confirmed primary adenocarcinoma of the colon and rectum, diagnosed within the previous 12 months, are eligible. Participants were assessed and were followed up for 3 years. Baseline information, including demographics, socioeconomic status, family history, medical and surgical non‐cancer‐related history, dietary history, colonoscopic findings, staging at presentation, treatment, and disease recurrence, is collected, as well as blood tests and histology results. Outcomes include disease recurrence (local and metastatic) and survival. Results and Conclusion This study aims to describe the clinical presentation, management, and outcomes of adults with CRC in a multiethnic, urban South African population. It will be the first prospective study to describe clinical presentation, demographics, risk factors, treatment, and outcomes according to population group, from both private and state health‐care facilities in Johannesburg, South Africa. The results of this study will be relevant not only to South Africa but also to other SSA countries undergoing similar rates of rapid urbanization and epidemiological transition. This paper summarizes the design and methodology being used for a prospective cohort study of colorectal cancer (CRC) in Johannesburg, South Africa. It aims to describe the clinical presentation, management and outcomes of adults with CRC in a multi‐ethnic, urban South African population. It will be the first prospective study to describe clinical presentation, demographics, risk factors, treatment and outcomes according to population group, from both private and state healthcare facilities.
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Affiliation(s)
- Brendan Bebington
- Department of Surgery, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa.,Wits Donald Gordon Medical Center Johannesburg South Africa
| | - Elvira Singh
- National Cancer Registry National Health Laboratory Service Johannesburg South Africa.,School of Public Health University of the Witwatersrand Johannesburg South Africa
| | - June Fabian
- Wits Donald Gordon Medical Center Johannesburg South Africa.,Division of Medical Oncology, Department of Internal Medicine, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
| | - Christine Jan Kruger
- Department of Surgery, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
| | - Leanne Prodehl
- Department of Surgery, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
| | - Daniel Surridge
- Department of Surgery, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
| | - Clem Penny
- Division of Medical Oncology, Department of Internal Medicine, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
| | - Lynne McNamara
- Division of Medical Oncology, Department of Internal Medicine, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
| | - Paul Ruff
- Wits Donald Gordon Medical Center Johannesburg South Africa.,Division of Medical Oncology, Department of Internal Medicine, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
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Katsidzira L, Gangaidzo I, Thomson S, Rusakaniko S, Matenga J, Ramesar R. The shifting epidemiology of colorectal cancer in sub-Saharan Africa. Lancet Gastroenterol Hepatol 2017; 2:377-383. [PMID: 28397702 DOI: 10.1016/s2468-1253(16)30183-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 02/07/2023]
Abstract
The perception that colorectal cancer is rare in sub-Saharan Africa is widely held; however, it is unclear whether this is due to poor epidemiological data or to lower disease rates. The quality of epidemiological data has somewhat improved, and there is an ongoing transition to western dietary and lifestyle practices associated with colorectal cancer. The impact of these changes on the incidence of colorectal cancer is not as evident as it is with other non-communicable diseases such as diabetes. In this Viewpoint, we discuss the epidemiology of colorectal cancer in sub-Saharan Africa. Colorectal cancer in this region frequently occurs at an early age, often with distinctive histological characteristics. We detail the crucial need for hypothesis-driven research on the risk factors for colorectal cancer in this population and identify key research gaps. Should colorectal cancer occur more frequently than assumed, then commensurate allocation of resources will be needed for diagnosis and treatment.
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Affiliation(s)
- Leolin Katsidzira
- Division of Gastroenterology, Department of Medicine, University of Cape Town, Cape Town, South Africa; Department of Medicine, College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe.
| | - Innocent Gangaidzo
- Department of Medicine, College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Sandie Thomson
- Division of Gastroenterology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Simbarashe Rusakaniko
- Department of Community Medicine, College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Jonathan Matenga
- Department of Medicine, College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Raj Ramesar
- MRC/UCT Human Genetics Research Unit, Division of Human Genetics, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
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Early-Onset Signet-Ring Cell Adenocarcinoma of the Colon: A Case Report and Review of the Literature. Case Rep Oncol Med 2017; 2017:2832180. [PMID: 28326211 PMCID: PMC5343248 DOI: 10.1155/2017/2832180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 11/22/2016] [Accepted: 12/20/2016] [Indexed: 02/07/2023] Open
Abstract
Colorectal cancer (CRC) remains the second leading cause of cancer-related deaths in the United States. While a decline has been observed in the older population, the occurrence of CRC in the adolescent and young adult (AYA) population has increased over the past two decades. The histopathologic characteristics and clinical behavior of CRC in AYA patients have been shown to be distinct from those of CRC in older adults. The rarer subtypes of CRC such as mucinous adenocarcinoma and signet-ring cell carcinoma are associated with a poorer prognosis compared to the more common subtypes. Here we report a case of a 20-year-old man who was diagnosed with stage IVB (T4 N2 M1, with peritoneal carcinomatosis) signet-ring cell adenocarcinoma of the colon. The scarcity of information on these rarer subtypes merits further study and investigation.
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Khan NA, Hussain M, ur Rahman A, Farooqui WA, Rasheed A, Memon AS. Dietary Practices, Addictive Behavior and Bowel Habits and Risk of Early Onset Colorectal Cancer: a Case Control Study. Asian Pac J Cancer Prev 2016; 16:7967-73. [PMID: 26625827 DOI: 10.7314/apjcp.2015.16.17.7967] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The abrupt rise of colorectal cancer in developing countries is raising concern in healthcare settings. Studies on assessing relationships with modifiable and non-modifiable risk factors in the Pakistani population have been limited. The present investigation was designed to examine associations of dietary practices, addictive behavior and bowel habits in developing colorectal cancer (CRC) among patients in a low-resource setup. MATERIALS AND METHODS An age-gender matched case control study was conducted from October 2011 to July 2015 in Karachi, Pakistan. Cases were from the surgical oncology department of a public sector tertiary care hospital, while their two pair-matched controls were recruited from the general population. A structured questionnaire was used which included questions related to demographic characteristics, family history, dietary patterns, addictive behavior and bowel habits. RESULTS A family history of cancer was associated with a 2.2 fold higher chance of developing CRC. Weight loss reduced the likelihood 7.6 times. Refraining from a high fat diet and consuming more vegetables showed protective effects for CRC. The risk of CRC was more than twice among smokers and those who consumed Asian specific addictive products as compared to those who avoid using these addictions (ORsmoking: 2.12, 95% CI: 1.08 - 4.17, ORpan: 2.92, 95% CI: 1.6 - 5.33, ORgutka: 2.13, 95% CI: 1.14 - 3.97). Use of NSAID attenuated risk of CRC up to 86% (OR: 0.14, 95% CI: 0.07 - 0.31). CONCLUSIONS Most of the findings showed concordance with the literature elucidating protective effects of consuming vegetables and low fat diet while documenting adverse associations with family history, weight loss, constipation and hematochezia. Moreover, this study highlighted Asian specific indigenous addictive products as important factors. Further studies are needed to validate the findings produced by this research.
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Affiliation(s)
- Naveed Ali Khan
- Department of Surgical Oncology, Civil Hospital and Dow University of Health Sciences, Karachi, Pakistan E-mail :
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Katsidzira L, Chokunonga E, Gangaidzo IT, Rusakaniko S, Borok M, Matsena-Zingoni Z, Thomson S, Ramesar R, Matenga JA. The incidence and histo-pathological characteristics of colorectal cancer in a population based cancer registry in Zimbabwe. Cancer Epidemiol 2016; 44:96-100. [PMID: 27541963 DOI: 10.1016/j.canep.2016.08.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/24/2016] [Accepted: 08/01/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Data on colorectal cancer (CRC) in sub-Saharan Africa is mainly based on hospital series which suggest low incidence and frequent early onset cancers. This study characterises colorectal cancer in a population-based cancer registry in Zimbabwe. METHODS Cases of CRC recorded by the Zimbabwe National Cancer Registry between 2003 and 2012 were analysed. Demographic and pathological characteristics were compared according to ethnicity and age. Trends in age standardised incidence rates (ASR) were determined. RESULTS There were 886 and 216 cases of CRC among black Africans and Caucasians respectively, and 26% of the black Africans were younger than 40 years. Signet ring cell carcinomas were more common among black Africans compared to Caucasians (4% vs 1%, p=0.027). ASR increased by 1.9%/year and 3.9%/year among black African males and females respectively. CONCLUSION CRC incidence is rising among black Africans and has unique demographic and pathological characteristics.
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Affiliation(s)
- Leolin Katsidzira
- Department of Medicine, College of Health Sciences, University of Zimbabwe, P.O. Box A178, Avondale, Harare, Zimbabwe; Division of Gastroenterology, Department of Medicine, University of Cape Town, Cape Town, Groote Schuur Hospital, Observatory 7925, Cape Town, South Africa.
| | - Eric Chokunonga
- Zimbabwe National Cancer Registry, P.O. Box A449, Avondale, Harare, Zimbabwe
| | - Innocent T Gangaidzo
- Department of Medicine, College of Health Sciences, University of Zimbabwe, P.O. Box A178, Avondale, Harare, Zimbabwe
| | - Simbarashe Rusakaniko
- Department of Community Medicine, College of Health Sciences, University of Zimbabwe, P.O. Box A178, Avondale, Harare, Zimbabwe
| | - Margaret Borok
- Department of Medicine, College of Health Sciences, University of Zimbabwe, P.O. Box A178, Avondale, Harare, Zimbabwe; Zimbabwe National Cancer Registry, P.O. Box A449, Avondale, Harare, Zimbabwe
| | | | - Sandie Thomson
- Division of Gastroenterology, Department of Medicine, University of Cape Town, Cape Town, Groote Schuur Hospital, Observatory 7925, Cape Town, South Africa
| | - Raj Ramesar
- MRC/UCT Human Genetics Research Unit, Division of Human Genetics, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, South Africa
| | - Jonathan A Matenga
- Department of Medicine, College of Health Sciences, University of Zimbabwe, P.O. Box A178, Avondale, Harare, Zimbabwe
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