1. Institute of Clinical Infectious Diseases, Catholic University of the Sacred Heart, Rome, Italy
2. Division of Infectious Diseases, San Gerardo Hospital, University of Milano-Bicocca, Monza, Italy
3. Infectious Dermatology and Allergology Unit, IFO S. Gallicano Institute (IRCCS), Rome, Italy
4. Infectious Diseases Unit, Azienda Ospedaliera Universitaria Senese, Siena, Italy