Alessandra Fisher (Department of Experimental, Clinical and Biomedical Sciences, Sexual Medicine and Andrology Unit, University of Florence, Florence), Giovanni Castellini (Department of Experimental, Clinical and Biomedical Sciences Careggi University Hospital; Psychiatry Unit, Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence), Jiska Ristori (Department of Experimental, Clinical and Biomedical Sciences, Sexual Medicine and Andrology Unit, University of Florence, Florence), Helen Casale (Department of Experimental, Clinical and Biomedical Sciences, Sexual Medicine and Andrology Unit, University of Florence, Florence), Guido Giovanardi (Department of Dynamic and Clinical Psychology, Faculty of Medicine and Psychology, Sapienza University of Rome, Rome), Nicola Carone (Department of Developmental and Social Psychology, Faculty of Medicine and Psychology, Sapienza University of Rome, Rome), Egidia Fanni (Department of Experimental, Clinical and Biomedical Sciences, Sexual Medicine and Andrology Unit, University of Florence, Florence), Maddalena Mosconi (Gender Identity Development Service, Hospital S.Camillo-Forlanini), Giacomo Ciocca (Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila), Emmanuele Jannini (Department of Systems Medicine, University of Rome Tor Vergata, Rome), Valdo Ricca (Psychiatry Unit, Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence), Vittorio Lingiardi (3Department of Dynamic and Clinical Psychology, Faculty of Medicine and Psychology, Sapienza University of Rome, Rome), Mario Maggi (Department of Experimental, Clinical and Biomedical Sciences, Sexual Medicine and Andrology Unit, University of Florence, Florence)