1. Internal Medicine, Hospital San Roque Maspalomas (HSRM), Gran Canaria, Spain;
2. Unit of Infectious Diseases and Tropical Medicine, Hospital Universitario Insular de Gran Canaria (HUIGC), Las Palmas, Spain;
3. Department of Medical and Surgical Sciences, University of Las Palmas, Las Palmas, Spain;
4. Internal Medicine, Puerta de Hierro Hospital, Madrid, Spain