[1] Tulane Univ, Sch Publ Hlth & Trop Med, 1440 Canal St, New Orleans, LA 70112 USA
[2] Univ Michigan, Sch Publ Hlth, 1415 Washington Hts, Ann Arbor, MI 48109 USA
[3] Virginia Commonwealth Univ, Sch Med, 1201 E Marshall St, Richmond, VA 23298 USA
[4] Tulane Univ, Sch Med, 1430 Tulane Ave, New Orleans, LA 70112 USA
[5] US Naval Med Res, Unit 6, Callao 2, Callao, Peru
[6] Univ Peruana Cayetano Heredia, Sch Publ Hlth & Adm, Ave Honorio Delgado 430, Lima 31, Peru
[7] Pontificia Univ Catolica Peru, Biomed Engn, Av Univ 1801, Lima 32, Peru
[8] Swiss Trop & Publ Hlth Inst, Socinstr 57, CH-4051 Basel, Switzerland
[9] Univ Basel, Swiss Trop & Publ Hlth Inst, Peterspl 1, CH-4001 Basel, Switzerland