1. Universidad Científica del Sur, Lima, PERU
2. Department of Infectious Diseases, Hospital Nacional Edgardo Rebagliati Martins, Lima, PERU
3. South American Center for Education and Research in Public Health, Universidad Norbert Wiener, Lima, PERU
4. Universidad Peruana de Ciencias Aplicadas, Lima, PERU
5. Internal Medicine, Hospital Militar Central “Luis Arias Schereiber”, Lima, PERU