About the Authors

César R. Nureña

Affiliation Escuela de Antropología, Universidad Nacional Mayor de San Marcos, Lima, Peru

Brandon Brown

brandojb@uci.edu

Affiliation Department of Population Health and Disease Prevention, University of California Irvine, Irvine, California, United States of America

Jerome T. Galea

Affiliation Epicentro, Lima, Peru

Hugo Sánchez

Affiliation Epicentro, Lima, Peru

Magaly M. Blas

Affiliation Epidemiology, STD and HIV Unit, School of Public Health and Administration, Universidad Peruana Cayetano Heredia, Lima, Peru

Competing Interests

The authors declare that they have no competing interests. Magaly Blas and Brandon Brown received a research grant from the Investigator-Initiated Studies Program of Merck & Co., Inc. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: BB JG MB. Performed the experiments: CN HS. Analyzed the data: CN BB JG. Wrote the paper: CN BB JG HS MB.