About the Authors

Sharon A. Abbott

sharonabbott@gmail.com

Affiliation Population Council, New York, New York, United States of America

Nicole A. Haberland

Affiliation Population Council, New York, New York, United States of America

Drosin M. Mulenga

Affiliation Population Council, Lusaka, Zambia

Paul C. Hewett

Affiliation Population Council, Lusaka, Zambia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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.