1. Stony Brook University School of Medicine, Stony Brook, New York;
2. Thomas Jefferson University Hospital, Philadelphia, Pennsylvania;
3. US Naval Medical Research Unit No. 6, Lima, Peru;
4. Universidad Peruana Cayetano Heredia, Lima, Peru;
5. University of Arizona, Tucson, Arizona;
6. School of Medicine, Universidad Peruana de Ciencias Aplicadas (UPC), Lima, Peru;
7. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland