1. Unit of Infectious Diseases, Dipartimento di Area Medica, “Santa Chiara” Hospital, Trento, Italy.
2. Unit of Infectious Diseases, Azienda Ospedaliera Universitaria Integrata, “G.B. Rossi” Hospital, Verona, Italy.
3. Faculty of Medicine, University of Puthisastra, Phnom Penh, Cambodia.