1. Clinical Department of Infectious Diseases and Research, HIV/AIDS Unit, National Institute for Infectious Diseases Lazzaro Spallanzani Istituto di Ricovero e Cura a Carattere Scientifico , Rome , Italy
2. Clinical Department of Infectious Diseases and Research, Psychology Service, National Institute for Infectious Diseases Lazzaro Spallanzani Istituto di Ricovero e Cura a Carattere Scientifico , Rome , Italy
3. National Center for Disease Prevention and Health Promotion, National Institute of Health , Rome , Italy