About the Authors

Michael G. Chipeta

mikechipeta@yahoo.co.uk

Affiliation Malawi Liverpool-Wellcome Trust Clinical Research Programme, Blantyre, Malawi

Bagrey Ngwira

Affiliation Community Health Department, University of Malawi, College of Medicine, Blantyre, Malawi

Lawrence N. Kazembe

Affiliation Statistics Department, University of Namibia, Windhoek, Namibia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BN. Performed the experiments: BN. Analyzed the data: MGC LNK. Contributed reagents/materials/analysis tools: BN LNK MGC. Wrote the paper: MGC BN LNK.