About the Authors

Titilola M. Pedro

titilolapedro@gmail.com

Affiliation MRC/Wits Developmental Pathways for Health Research Unit,Department of Paediatrics,/Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Lisa K. Micklesfield

Affiliation MRC/Wits Developmental Pathways for Health Research Unit,Department of Paediatrics,/Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Kathleen Kahn

Affiliation MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt),School of Public Health,/Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Stephen M. Tollman

Affiliation MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt),School of Public Health,/Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

John M. Pettifor

Affiliation MRC/Wits Developmental Pathways for Health Research Unit,Department of Paediatrics,/Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Shane A. Norris

Affiliation MRC/Wits Developmental Pathways for Health Research Unit,Department of Paediatrics,/Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Gauteng, South Africa

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TM LK KK SMT JMP SAN. Performed the experiments: TM. Analyzed the data: TM. Contributed reagents/materials/analysis tools: TM LK KK SMT JMP SAN. Wrote the paper: TM.