1. Tropical and Travel Medicine Unit, Hospital Carlos III – La Paz, Madrid, Spain
2. Gambo Rural General Hospital, Gambo, Ethiopia
3. Division of Infectious Diseases, Fundación Jiménez-Díaz, Universidad Autonoma de Madrid, Madrid, Spain
4. Department of Internal Medicine, Hospital General Universitario de Alicante, Universidad Miguel Hernández de Elche, Alicante, Spain