About the Authors

Susan C. Aitken

Affiliation Department of Medical Microbiology, University Medical Centre Utrecht, Utrecht, The Netherlands

Carole L. Wallis

Affiliation Lancet Laboratories, Johannesburg, South Africa

Wendy Stevens

Affiliations Department of Molecular Medicine and Hematology, University of the Witwatersrand, Johannesburg, South Africa, National Health Laboratory Services, Johannesburg, South Africa

Tobias Rinke de Wit

Affiliations PharmAccess International, Amsterdam, The Netherlands, Global Health Department, Amsterdam Institute for Global Health and Development (AIGHD), Academic Medical Center, Amsterdam, the Netherlands

Rob Schuurman

R.Schuurman-1@umcutrecht.nl

Affiliation Department of Medical Microbiology, University Medical Centre Utrecht, Utrecht, The Netherlands

Competing Interests

CW is an employee of Lancet Laboratories. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SCA CW WS TRDW RS. Performed the experiments: SCA. Analyzed the data: SCA CW RS. Contributed reagents/materials/analysis tools: SCA CW RS. Wrote the paper: SCA CW WS TRDW RS.