1. Carrera de Medicina, Instituto de Biomedicina, Universidad Central, Quito, Ecuador;
2. Laboratorio Clinico, Hospital General Docente Calderón MSP, Quito, Ecuador;
3. Centre for Tropical Diseases, IRCCS Sacro Cuore Don Calabria Hospital, Verona, Italy
4. Centro de Epidemiología Comunitaria y Medicina Tropical (CECOMET), Esmeraldas, Ecuador;