1. Department of Medicine, Klinikum Muenchen-Perlach, Munich, Germany
2. Department of Medicine–Pediatrics, University of Minnesota, Minneapolis, Minnesota, USA
3. Department of Internal Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
4. Infectious and Tropical Diseases Unit, San Bortolo Hospital, Vicenza, Italy
5. Division of Infectious and Tropical Diseases, Istituto Di Ricovero e Cura a Carattere Scientifico San Matteo Hospital Foundation, University of Pavia, Pavia, Italy