1. San Gallicano Institute, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 00144 Rome, Italy
2. Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón, 28007 Madrid, Spain
3. Regina Elena National Cancer Institute, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 00144 Rome, Italy