About the Authors

Nigel C. Rollins

rollinsn@who.int

Affiliations World Health Organization, Geneva, Switzerland, University of KwaZulu-Natal, Durban, South Africa

James Ndirangu

Affiliation Africa Centre for Health and Population Studies, University of KwaZulu-Natal, Mtubatuba, South Africa

Ruth M. Bland

Affiliations Africa Centre for Health and Population Studies, University of KwaZulu-Natal, Mtubatuba, South Africa, University of Glasgow, Glasgow, United Kingdom

Anna Coutsoudis

Affiliation University of KwaZulu-Natal, Durban, South Africa

Hoosen M. Coovadia

Affiliations University of KwaZulu-Natal, Durban, South Africa, University of the Witwatersand, Johannesburg, South Africa

Marie-Louise Newell

Affiliations Africa Centre for Health and Population Studies, University of KwaZulu-Natal, Mtubatuba, South Africa, University College London, Institute of Child Health, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AC HMC NCR MLN. Performed the experiments: NCR RMB. Analyzed the data: JN NCR RMB MLN. Wrote the manuscript: NCR JN. Reviewed and approved the manuscript: AC HMC NCR MLN RMB JN.