1. Department of Medicine, Division of Infectious Diseases, Emory University School of Medicine, Atlanta, Georgia, USA
2. Department of Global Health, Rollins School of Public Health, Atlanta, Georgia, USA
3. Departamento de Producción, Instituto de Investigaciones en Ciencias de la Salud, Universidad Nacional de Asunción, Asunción, Paraguay
4. Department of Pathology, Stanford University School of Medicine, Stanford, California, USA
5. Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA