About the Authors
- Sharon A. Abbott, Nicole A. Haberland
- Population Council, New York, New York, United States of America
- Drosin M. Mulenga, Paul C. Hewett
- Population Council, Lusaka, Zambia
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SAA NAH DMM PCH. Performed the experiments: SAA NAH DMM PCH. Analyzed the data: SAA NAH DMM PCH. Contributed reagents/materials/analysis tools: SAA NAH DMM PCH. Wrote the paper: SAA NAH DMM PCH.