[1] Stanford Univ, Sch Med, Dept Med, Div Infect Dis & Geog Med, Stanford, CA 94305 USA
[2] Stanford Univ, Sch Med, Dept Pathol, Stanford, CA 94305 USA
[3] Sustainable Sci Inst, Managua, Nicaragua
[4] Minist Hlth, Ctr Nacl Diagnost & Referencia, Natl Virol Lab, Managua, Nicaragua
[5] Lady Ridgeway Hosp, Dept Med Microbiol, Colombo, Sri Lanka
[6] Univ Calif Berkeley, Sch Publ Hlth, Div Infect Dis & Vaccinol, Berkeley, CA 94720 USA