About the Authors
- Kerry Sidwell Wilson
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Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Visualization, Writing – original draft, Writing – review & editing
* E-mail: KerryW@nioh.ac.za
Affiliations Epidemiology and Surveillance Section, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, Johannesburg, South Africa, Faculty of Health Sciences, School of Public Health, University of the Witwatersrand, Witwatersrand, South Africa
- Vusi Ntlebi
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Roles Writing – review & editing
Affiliation Epidemiology and Surveillance Section, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, Johannesburg, South Africa
- Felix Made
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Roles Formal analysis, Methodology, Writing – review & editing
Affiliation Epidemiology and Surveillance Section, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, Johannesburg, South Africa
- Natasha Sanabria
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Roles Investigation, Writing – original draft, Writing – review & editing
Affiliation Toxicology and Biochemistry Department, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, South Africa
- Melissa Vetten
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Roles Investigation, Writing – original draft, Writing – review & editing
Affiliation Toxicology and Biochemistry Department, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, South Africa
- Jitcy Joseph
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Roles Writing – original draft, Writing – review & editing
Affiliation Toxicology and Biochemistry Department, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, South Africa
- Graham Chin
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Roles Methodology, Supervision
Affiliation National Safety Health and Environment Department, National Institute for Occupational Health, A Division of National Health Laboratory Services, Braamfontein, South Africa
- David Jones
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Roles Conceptualization, Supervision
Affiliation National Safety Health and Environment Department, National Institute for Occupational Health, A Division of National Health Laboratory Services, Braamfontein, South Africa
- Nonhlanhla Tlotleng
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Roles Formal analysis, Investigation, Methodology, Visualization, Writing – review & editing
Affiliation Epidemiology and Surveillance Section, National Institute for Occupational Health, A Division of National Health Laboratory Service, Braamfontein, Johannesburg, South Africa
Competing Interests
I have read the journal’s policy and the authors of this manuscript have the following competing interests: One author is involved in establishing the information system used here to provide the data in the local government health departments. This does not alter our adherence to PLOS ONE policies on sharing data and materials.