About the Authors

Aweke A. Mitku

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing

mitkua@ukzn.ac.za

Affiliations School of Mathematics, Statistics and Computer Science, College of Agriculture Engineering and Science, University of KwaZulu-Natal, Durban, South Africa, Department of Statistics, College of Science, Bahir Dar University, Bahir Dar, Ethiopia

Temesgen Zewotir

Roles Conceptualization, Methodology, Supervision, Writing – review & editing

Affiliation School of Mathematics, Statistics and Computer Science, College of Agriculture Engineering and Science, University of KwaZulu-Natal, Durban, South Africa

Delia North

Roles Methodology, Supervision, Writing – review & editing

Affiliation School of Mathematics, Statistics and Computer Science, College of Agriculture Engineering and Science, University of KwaZulu-Natal, Durban, South Africa

Prakash Jeena

Roles Conceptualization, Validation, Writing – review & editing

Affiliation Discipline of Paediatrics and Child Health, School of Clinical Medicine, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa

Rajen N. Naidoo

Roles Conceptualization, Project administration, Supervision, Writing – review & editing

Affiliation Discipline of Occupational and Environmental Health, School of Nursing and Public Health, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa

Competing Interests

The authors have read the journal’s policy and have the following competing interests: RNN received funding from the AstraZeneca Research Trust. This does not alter our adherence to PLOS ONE policies on sharing data and materials. There are no patents, products in development or marketed products associated with this research to declare.