Tropical Data: Approach and Methodology as Applied to Trachoma Prevalence Surveys

References

• World Health Organization. Ending the neglect to attain the sustainable development goals – a road map for neglected tropical diseases 2021–2030. 2020. https://www.who.int/publications/i/item/9789240010352 .
   Google Scholar
• Solomon AW, Kello AB, Bangert M, et al. The simplified trachoma grading system, amended. Bull World Health Organ. 2020;98(10):698–705. doi:10.2471/BLT.19.248708.
   PubMed Web of Science ®Google Scholar
• Taylor HR, Johnson SL, Prendergast RA, Schachter J, Dawson CR, Silverstein AM. An animal model of trachoma II. The importance of repeated reinfection. Invest Ophthalmol Vis Sci. 1982;23:507–515.
   PubMed Web of Science ®Google Scholar
• Gambhir M, Basáñez M-G, Burton MJ, Lietman TM, et al. The development of an age-structured model for trachoma transmission dynamics, pathogenesis and control. PLoS Negl Trop Dis. 2009;3(6):e462. doi:10.1371/JOURNAL.PNTD.0000462.
   PubMed Web of Science ®Google Scholar
• Evans JR, Solomon AW, Kumar R, et al. Antibiotics for trachoma. Cochrane Database Syst Rev. 2019;2019(9). doi:10.1002/14651858.CD001860.PUB4.
   Google Scholar
• World Health Organization. Validation of elimination of trachoma as a public health problem. 2016. https://www.who.int/publications/i/item/who-htm-ntd-2016.8. Accessed May 12, 2021.
   Google Scholar
• Francis V, Turner V Achieving community support for trachoma control (WHO/PBL/93.36). Published online 1995.
   Google Scholar
• Solomon AW, Zondervan M, Kuper H, Buchan JC, Mabey DCW, Foster A. Trachoma Control: A Guide for Programme Managers. Geneva: World Health Organization; 2006.
   Google Scholar
• World Health Organization. Report of the 3rd global scientific meeting on trachoma, Johns Hopkins University, Baltimore, MA, 19-20 July 2010 (WHO/PBD/2.10). 2010.
   Google Scholar
• Solomon AW, Bella AL, Negussu N, TH WR. How much trachomatous trichiasis is there? A guide to calculating district-level estimates. Community Eye Health. 2019;31(104):55–58.
   Google Scholar
• The International Coalition for Trachoma Control (ICTC). Transition planning for trichiasis management services. ICTC_TransitionPlanningTrichiasis_041819_FINALonline_0.pdf(trachomacoalition.org). Published online 2019. Accessed October 12, 2021.
   Google Scholar
• World Health Organization. Technical Consultation on Trachoma Surveillance, September 11−12, 2014: strategic and technical advisory group on neglected tropical diseases, working group on monitoring and evaluation. Geneva: World Health Organization; 2015. https://www.who.int/publications/i/item/WHO-HTM-NTD-2015.02.
   Google Scholar
• World Health Organization. Design and validation of a trachomatous trichiasis-only survey: strategic and technical advisory group for neglected tropical diseases, working group on monitoring and evaluation. Geneva: World Health Organization; 2017. License: CC BY-NC-SA 3.0 IGO. https://apps.who.int/iris/handle/10665/259815.
   Google Scholar
• Solomon AW, Hooper PJ, Bangert M, et al. The importance of failure: how doing impact surveys that fail saves trachoma programs money. Am J Trop Med Hyg. 2020;103(6):2481. doi:10.4269/ajtmh.20-0686.
   PubMed Web of Science ®Google Scholar
• Courtright P, Rotondo LA, MacArthur C, et al. Strengthening the links between mapping, planning and global engagement for disease elimination: lessons learnt from trachoma. Br J Ophthalmol. 2018;102(10):1324–1327. doi:10.1136/bjophthalmol-2018-312476.
   PubMed Web of Science ®Google Scholar
• Solomon AW, Pavluck AL, Courtright P, et al. The global trachoma mapping project: methodology of a 34-country population-based study. 2015;22(3):214–225. doi:10.3109/09286586.2015.1037401.
   Google Scholar
• Strachan CE Global trachoma mapping project. end of project evaluation: evaluation report. Sightsavers; 2016.
   Google Scholar
• West SK. Toward the elimination of disease: the 2019 Weisenfeld award lecture. Invest Ophthalmol Vis Sci. 2019;60(14):4805–4810. doi:10.1167/iovs.19-28629.
   Google Scholar
• Heggen AE, Solomon AW, Courtright P. Perspectives of national coordinators and partners on the work of the global trachoma mapping project. Ophthalmic Epidemiol. 2016;23(6):366–372. doi:10.1080/09286586.2016.1229795.
   PubMed Web of Science ®Google Scholar
• Devex Editor. What can the trachoma community teach us about partnerships? https://stories.devex.com/what-can-trachoma-community-teach/. Published 2020. Accessed October 15, 2020.
   Google Scholar
• Emerson PM, Hooper PJ, Sarah V, Hotez PJ. Progress and projections in the program to eliminate trachoma. PLoS Negl Trop Dis. 2017;11(4):2–5. doi:10.1371/journal.pntd.0005402.
   Web of Science ®Google Scholar
• Cama A, Keenan JD, Dejene M, Courtright P. Impact of the global trachoma mapping project. Ophthalmic Epidemiol. 2018;25(sup1):1–2. doi:10.1080/09286586.2018.1550205.
   PubMed Web of Science ®Google Scholar
• Solomon AW, Burton MJ, Gower EW, et al. Trachoma. Nat Rev Dis Prim. 2022;8(1):32. doi:10.1038/s41572-022-00359-5.
   PubMed Web of Science ®Google Scholar
• World Health Organization. Tropical Data. http://www.who.int/trachoma/news/Tropical_data.pdf. Published 2016. Accessed October 15, 2020.
   Google Scholar
• Solomon AW, Willis R, Pavluck AL, et al. Quality assurance and quality control in the global trachoma mapping project. Am J Trop Med Hyg. 2018;99(4):858–863. doi:10.4269/ajtmh.18-0082.
   PubMed Web of Science ®Google Scholar
• Hoffman JJ, Habtamu E, Rono H, Ngondi JM, et al. 3D images as a field grader training tool for trachomatous trichiasis: a diagnostic accuracy study in Ethiopia. PLoS Negl Trop Dis. 2019;13(1):e0007104. doi:10.1371/journal.pntd.0007104.
   Google Scholar
• Solomon AW, Le Mesurier RT, Williams WJ. A diagnostic instrument to help field graders evaluate active trachoma. Ophthalmic Epidemiol. 2018;25(5–6):399–402. doi:10.1080/09286586.2018.1500616.
   PubMed Web of Science ®Google Scholar
• World Health Organization. Design parameters for population-based trachoma prevalence surveys. Geneva: World Health Organization; 2018. Licence: CC BY-NC-SA 3.0 IGO. https://www.who.int/publications/i/item/who-htm-ntd-pct-2018.07.
   Google Scholar
• Milligan P, Njie A, Bennett S. Comparison of two cluster sampling methods for health surveys in developing countries. Int J Epidemiol. 2004;33(3):469–476. doi:10.1093/ije/dyh096.
   PubMed Web of Science ®Google Scholar
• World Health Organization. Preventive chemotherapy: tools for improving the quality of reported data and information. A field manual for implementation. 2019.
   Google Scholar
• Macleod CK, Bailey RL, Dejene M, et al. Estimating the intracluster correlation coefficient for the clinical sign “trachomatous inflammation—follicular” in population-based trachoma prevalence surveys: results from a meta-regression analysis of 261 standardized preintervention surveys carried out in Ethiopia, Mozambique, and Nigeria. Am J Epidemiol. 2020;189(1):68–76. doi:10.1093/aje/kwz196.
   PubMed Web of Science ®Google Scholar
• Kirkwood B, Sterne J. Essential Medical Statistics. 2nd ed. Oxford: Blackwell Science Ltd.; 2003.
   Google Scholar
• Cama A, Müller A, Taoaba R, French M, et al. Prevalence of signs of trachoma, ocular chlamydia trachomatis infection and antibodies to Pgp3 in residents of Kiritimati Island, Kiribati. PLoS Negl Trop Dis. 2017;11(9):e0005863. doi:10.1371/journal.pntd.0005863.
   PubMed Web of Science ®Google Scholar
• Hazra A, Gogtay N. Biostatistics series module 5: determining sample size. Indian J Dermatol. 2016;61(5):496–504. doi:10.4103/0019-5154.190119.
   Google Scholar
• Courtright P, Gass K, Lewallen S, et al. Global trachoma mapping project: training for mapping of trachoma (version 2). London: International Coalition for Trachoma Control; 2013.https://www.trachomacoalition.org/resources/global-trachoma-mapping-project-training-mapping-trachoma-version-2.
   Google Scholar
• Courtright P, MacArthur C, Macleod C, et al. Tropical Data: Training System for Trachoma Prevalence Surveys (Version 3), International Coalition for Trachoma Control. London: International Coalition for Trachoma Control; 2019. https://www.trachomacoalition.org/resources/global-trachoma-mapping-project-training-mapping-trachoma-version-3.
   Google Scholar
• Courtright P, Flueckiger RM, Harding-Esch EM, Lewallen S, Solomon AW. Tropical Data: system training for trachomatous trichiasis population-based prevalence surveys (Version 2) Available at: https://tropicaldata.knowledgeowl.com/help/training-system-for-tt-only-surveys. Published online 2019. (London: International Coalition for Trachoma Control).
   Google Scholar
• Rahman SA, Yu SN, Amza A, Gebreselassie S, Kadri B, Baido N, et al. Reliability of trachoma clinical grading—assessing grading of marginal cases. PLoS Negl Trop Dis. 2014;8(5):e2840. doi:10.1371/journal.pntd.0002840.
   Google Scholar
• Gaynor BD, Amza A, Gebresailassie S, et al. Importance of including borderline cases in trachoma grader certification. Am J Trop Med Hyg. 2014;91(3):577–579. doi:10.4269/ajtmh.13-0658.
   Google Scholar
• Hiep NX, Ngondi JM, Anh VT, et al. Trachoma in Viet Nam: results of 11 surveillance surveys conducted with the Global Trachoma Mapping Project. Ophthalmic Epidemiol. 2018;25(sup1):93–102. doi:10.1080/09286586.2018.1477964.
   PubMed Web of Science ®Google Scholar
• RTI. Bringing Tropical Data to the Pacific Islands. 21 Aug 2018. https://rti-intl-dev.medium.com/bringing-tropical-data-to-the-pacific-islands-d29b18ffbbe4 .
   Google Scholar
• Pavluck A, Chu B, Mann Flueckiger R, Ottesen E, Brooker S. Electronic data capture tools for global health programs: evolution of LINKS, an android-, web-based system. PLoS Negl Trop Dis. 2014;8(4):e2654. doi:10.1371/journal.pntd.0002654.
   PubMed Web of Science ®Google Scholar
• WHO/UNICEF. Joint Monitoring Programme for Water Supply, Sanitation and Hygiene. Core Questions on Drinking Water, Sanitation and Hygiene for Household Surveys: 2018 Update. New York: United Nations Children’s Fund (UNICEF) and World Health Organization; 2018.
   Google Scholar
• World Health Organization. Report of the 4th Global Scientific Meeting on Trachoma, Geneva, 27–29 November 2018. Geneva: World Health Organization; 2019. https://www.who.int/publications/i/item/who-htm-ntd-pct-2019.03.
   Google Scholar
• Phiri I, Manangazira P, Macleod CK, et al. The burden of and risk factors for trachoma in selected districts of Zimbabwe: results of 16 population-based prevalence surveys. Ophthalmic Epidemiol. 2018;25(sup1):181–191. doi:10.1080/09286586.2017.1298823.
   PubMed Web of Science ®Google Scholar
• Sherief ST, Macleod C, Gigar G, et al. The prevalence of trachoma in Tigray region, Northern Ethiopia: results of 11 population-based prevalence surveys completed as part of the global trachoma mapping project. Ophthalmic Epidemiol. 2016;23(sup1):94–99. doi:10.1080/09286586.2016.1250917.
   PubMed Web of Science ®Google Scholar
• Rotondo LA, Seligson R. The Zithromax® donation for trachoma elimination - how to apply for and manage the drug. Community Eye Health. 2011;24:22–23.
   Google Scholar
• Baayenda G, Mugume F, Turyaguma P, et al. Completing baseline mapping of trachoma in Uganda: results of 14 population-based prevalence surveys conducted in 2014 and 2018. Ophthalmic Epidemiol. 2018;25(sup1):162–170. doi:10.1080/09286586.2018.1546879.
   PubMed Web of Science ®Google Scholar
• Elshafie BE, Elsanosi MSA, El Amin A, et al. Trachoma prevalence in four localities of Darfur region, Sudan, following one round of antibiotic mass drug administration. Ophthalmic Epidemiol. 2021;1–9. doi:10.1080/09286586.2021.1953538.
   PubMed Web of Science ®Google Scholar
• Szwarcwald CL, Lopes MFC, Borges de Souza Junior PR, et al. Population prevalence of trachoma in nine rural non-indigenous evaluation units of Brazil. Ophthalmic Epidemiol. 2021;1–10. doi:10.1080/09286586.2021.1941127.
   Google Scholar
• Salam AS, Qayumi R, Majeed Siddiqi A, et al. Prevalence of trachoma in 72 districts of Afghanistan in 2018−2019: results of 35 population-based prevalence surveys. Ophthalmic Epidemiol. 2022;1–11. doi:10.1080/09286586.2021.2015784.
   Google Scholar
• Adamu MD, Mohammed Jabo A, Orji P, et al. Baseline prevalence of trachoma in 21 local government areas of Adamawa State, North East Nigeria. Ophthalmic Epidemiol. 2021;1–9. doi:10.1080/09286586.2021.2013899.
   Google Scholar
• Olamiju F, Isiyaku S, Olobio N, et al. Prevalence of trachoma following implementation of the SAFE strategy in three local government areas of Taraba State, North Eastern Nigeria. Ophthalmic Epidemiol. 2022;1–9. doi:10.1080/09286586.2022.2045025.
   Google Scholar
• Ilako D, Barasa E, Gichangi M, et al. Prevalence of trachomatous trichiasis in ten evaluation units of Embu and Kitui Counties, Kenya. Ophthalmic Epidemiol. 2022;1–8. doi:10.1080/09286586.2021.1986549.
   PubMed Web of Science ®Google Scholar
• Seyum D, Fetene N, Kifle T, et al. Prevalence of trachoma from 66 impact surveys in 52 woredas of Southern Nations, Nationalities and Peoples’ and Sidama regions of Ethiopia, 2017–2019. Ophthalmic Epidemiol. 2022;Ahead of print. doi:10.1080/09286586.2022.2065313.
   Google Scholar
• Sullivan KM, Harding-Esch EM, Keil AP, Werneck GL, et al. Exploring water, sanitation, and hygiene coverage targets for reaching and sustaining trachoma elimination: G-computation analysis. PLoS Negl Trop Dis. 2023;17(2):e0011103. doi:10.1371/journal.pntd.0011103.
   Google Scholar
• Garn JV, Boisson S, Willis R, Bakhtiari A, al-Khatib T, Amer K, et al. Sanitation and water supply coverage thresholds associated with active trachoma: modeling cross-sectional data from 13 countries. PLoS Negl Trop Dis. 2018;12(1):e0006110. doi:10.1371/journal.pntd.0006110.
   PubMed Web of Science ®Google Scholar
• Flueckiger RM, Courtright P, Abdala M, Foley J, et al. The global burden of trichiasis in 2016. PLoS Negl Trop Dis. 2019;13(11):e0007835. doi:10.1371/journal.pntd.0007835.
   PubMed Web of Science ®Google Scholar
• WHO. Guidelines on Ethical Issues in Public Health Surveillance. Geneva: World Health Organization; 2017. Licence: CC BY-NC-SA 3.0 IGO.
   Google Scholar
• USAID Act to End NTDs | East and Act to End NTDs | West. Trachoma Surveys: Practical Approaches to Implementing WHO Guidance for Neglected Tropical Disease (NTD) Programs in the Context of COVID-19. USAID’s Act to End NTDs | East and Act to End NTDs | West Programs; 2021. https://www.ntdtoolbox.org/sites/default/files/content/paragraphs/resource/files/2021-11/TRA%20Surveys%20Document%20for%20COVID.pdf.
   Google Scholar
• Sightsavers. Risk Assessment and Mitigation Action (RAMA) III: Disease Specific Assessments (English). Sightsavers; 2000. https://ntd-sightsavers.hub.arcgis.com/documents/68ad903b01bb4bfa92b5e836280a33df/about.
   Google Scholar
• World Health Organization. Key Planning Recommendations for Mass Gatherings in the Context of COVID-19: Interim Guidance. Geneva: World Health Organization; 2021. https://www.who.int/publications/i/item/10665-332235.
   Google Scholar
• Tropical Data. Tropical Data News. The Download June 2019 – Special issue! https://tropicaldata.knowledgeowl.com/help/tropical-data-news-june2019.
   Google Scholar
• Amoah B, Fronterre C, Johnson O, et al. Model-based geostatistics enables more precise estimates of neglected tropical-disease prevalence in elimination settings: mapping trachoma prevalence in Ethiopia. Int J Epidemiol. 2022;51(2):468–478. doi:10.1093/ije/dyab227.
   PubMed Web of Science ®Google Scholar
• Lynch KD, Apadinuwe SC, Lambert SB, Nash SD, et al. A national survey integrating clinical, laboratory, and WASH data to determine the typology of trachoma in Nauru. PLoS Negl Trop Dis. 2022;16(4):e0010275. doi:10.1371/journal.pntd.0010275.
   PubMed Web of Science ®Google Scholar
• Gwyn S, Awoussi MS, Bakhtiari A, et al. Comparison of platforms for testing antibodies to chlamydia trachomatis antigens in the Democratic Republic of the Congo and Togo. Sci Rep. 2021;11(1):7225. doi:10.1038/s41598-021-86639-8.
   Google Scholar
• Butcher R, Handley B, Garae M, et al. Ocular chlamydia trachomatis infection, anti-pgp3 antibodies and conjunctival scarring in Vanuatu and Tarawa, Kiribati before antibiotic treatment for trachoma. J Infect. 2020;80(4):454–461. doi:10.1016/j.jinf.2020.01.015.
   PubMed Web of Science ®Google Scholar
• Nesemann J, Muñoz MB, Morocho-Alburqueque N, et al. Prevalence of trachoma in Alto Amazonas, Loreto department, Perú. Invest Ophthalmol Vis Sci. 2021;62(8):2625.
   Google Scholar
• Butcher R, Tagabasoe J, Manemaka J, et al. Conjunctival scarring, corneal pannus, and herbert’s pits in adolescent children in trachoma-endemic populations of the Solomon Islands and Vanuatu. Clin Infect Dis. 2021;73(9):e2773–e2780. doi:10.1093/cid/ciaa1151.
   Google Scholar
• Goodhew B, Tekeraoi R, Taoaba R, et al. Change in serological metrics for Chlamydia trachomatis before and after mass drug administration with azithromycin in Kiribati. 2021 Annu Meet Abstr book Suppl to Am J Trop Med Hyg. Published online 2021.
   Google Scholar
• Naufal F, Brady CJ, Wolle MA, Wanji S, et al. Evaluation of photography using head-mounted display technology (ICAPS) for district Trachoma surveys. PLoS Negl Trop Dis. 2021;15(11):e0009928. doi:10.1371/journal.pntd.0009928.
   Google Scholar
• Harding-Esch E, Naufal F, Saboyá-Díaz MI, Jimenez C, West S. Use of photography for support of trachoma grading: progress report. International Coalition for Trachoma Control; 2022. https://www.trachomacoalition.org/sites/default/files/content/resources/files/Trachoma%20Photography%20Workshops%20Report.pdf
   Google Scholar
• Jimenez C, Gower E, Harding-Esch E, West SK. Harnessing photography and image recognition technology to aid in the elimination of trachoma. Community Eye Health. 2022;35:24.
   Google Scholar
• Sightsavers. Keeping patients safe during a global pandemic. Sightsavers; 2020, December. https://www.sightsavers.org/from-the-field/2020/12/face-shield-research/
   Google Scholar
• Saboyá-Díaz MI, Carey Angeles CA, Avellaneda Yajahuanca RDS, Abd-Alla AMM, et al. Associated factors of the co-occurrence of trachoma and soil-transmitted helminthiases in children 1 to 9 years old in rural communities of the Amazon basin in Loreto Department, Peru: results from a population-based survey. PLoS Negl Trop Dis. 2022;16(7):e0010532. doi:10.1371/journal.pntd.0010532.
   Google Scholar
• Negash BK, McPherson S. No one left behind: mapping NTDs in Ethiopia’s refugee camps. https://www.astmh.org/2016-meeting-blog/november-2016/no-one-left-behind-mapping-ntds-in-ethiopia%E2%80%99s-ref
   Google Scholar
• Harding-Esch EM, Brady MA, Angeles CAC, et al. Lessons from the field: integrated survey methodologies for neglected tropical diseases. Trans R Soc Trop Med Hyg. 2021;115(2):124–126. doi:10.1093/trstmh/traa132.
   Google Scholar
• PAHO. Guyana Remaps Lymphatic Filariasis Transmission in Six Regions and Move Towards the Elimination Goal. PAHO; 2019. https://www.paho.org/en/news/14-2-2019-guyana-remaps-lymphatic-filariasis-transmission-six-regions-and-move-towards.
   Google Scholar
• ENVISION. The ENVISION Impact: Final Report September 30, 2011 - December 31, 2019. 2019.
   Google Scholar
• Niles RA, Thickstun CR, Cox H, Hübner MP, et al. Assessing factors influencing communities’ acceptability of mass drug administration for the elimination of lymphatic filariasis in Guyana. PLoS Negl Trop Dis. 2021;15(9):e0009596. doi:10.1371/journal.pntd.0009596.
   Google Scholar
• World Health Organization. Informal consultation on end-game challenges for trachoma elimination, Task Force for Global Health, Decatur, United States of America, 7–9 December 2021. Geneva: World Health Organization; 2022. License: CC BY-NC-SA 3.0 IGO. https://apps.who.int/iris/handle/10665/363591.
   Google Scholar
• ICTC. The end in sight: from collaboration to elimination, strategic plan 2022–2030, May 2022.
   Google Scholar
• Yaya G. Lessons learned in the implementation of programmes to eliminate trachoma within conflict zones. Trans R Soc Trop Med Hyg. 2022;116(11):979–980. Published online. doi:10.1093/trstmh/trac061.
   PubMed Web of Science ®Google Scholar
• Kelly-Hope LA, Sanders AM, Harding-Esch E, et al. Complex emergencies and the control and elimination of neglected tropical diseases in Africa: developing a practical approach for implementing safe and effective mapping and intervention strategies. Confl Heal. 2021;15(1):18. doi:10.1186/s13031-021-00356-7.
   Google Scholar
• Stelmach RD, Flueckiger RM, Shutt J, Senok A, et al. The costs of monitoring trachoma elimination: Impact, surveillance, and trachomatous trichiasis (TT)-only surveys. PLoS Negl Trop Dis. 2019;13(9):e0007605. doi:10.1371/journal.pntd.0007605.
   PubMed Web of Science ®Google Scholar
• PAHO. An integrated, Sustainable Framework to Elimination of Communicable Diseases in the Americas. Concept Note. Washington, D.C: PAHO; 2019.
   Google Scholar
• PAHO. Fifth Regional Meeting of Managers of National Programs for the Elimination of Trachoma as a Public Health Problem in the Americas. (Lima, August 1-3 2018). 2019. Washington, D.C.: PAHO
   Google Scholar
• World Health Organization. Report of the 23rd meeting of the WHO Alliance for the Global Elimination of Trachoma by 2020, 30 November–1 December 2020. Geneva: World Health Organization; 2021. Licence: CC BY-NC-SA 3.0 IGO; 2021. https://apps.who.int/iris/handle/10665/341049.
   Google Scholar
• Bastawrous A, Rono HK, Livingstone IA, et al. Development and validation of a smartphone-based visual acuity test (PEEK acuity) for clinical practice and community-based fieldwork. JAMA Ophthalmol. 2015;133(8):930–937. doi:10.1001/jamaophthalmol.2015.1468.
   PubMed Web of Science ®Google Scholar
• Souza AA, Ducker C, Argaw D, et al. Diagnostics and the neglected tropical diseases roadmap: setting the agenda for 2030. Trans R Soc Trop Med Hyg. 2021;115(2):129–135. doi:10.1093/trstmh/traa118.
   Google Scholar
• World Health Organization. WASH and health working together. A ‘how-to’ guide for Neglected Tropical Disease programmes. Geneva: World Health Organization. 2019. https://www.who.int/publications/i/item/9789241515009.
   Google Scholar
• Engels D. The Global Trachoma Mapping Project: a catalyst for progress against neglected tropical diseases. Ophthalmic Epidemiol. 2016;23(sup1):1–2. doi:10.1080/09286586.2016.1257139.
   PubMed Web of Science ®Google Scholar