1 Institute of Psychiatry, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168 Roma, Italy; Department of Psychiatry, Fondazione Policlinico Universitario "Agostino Gemelli" IRCCS, Roma, Italy. Electronic address: gabriele.sani@unicatt.it.
2 Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Mental Health Care Line, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA. Electronic address: alan.swann@bcm.edu.