1. Department of Neuroscience, Section of Psychiatry, Università Cattolica del Sacro Cuore, Rome, Italy;
2. Department of Psychiatry, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy;
3. Centro Lucio Bini, Rome, Italy;
4. Department of Psychiatry, Harvard Medical School, Boston, MA, USA;
5. International Consortium for the Research on Mood and Psychotic Disorders, McLean Hospital, Belmont, MA, USA;
6. Department of Neurology and Psychiatry, Faculty of Medicine, Clínica Alemana Universidad del Desarrollo, Santiago, Chile;
7. Early Intervention Program, Instituto Psiquiátrico Dr J. Horwitz Barak, Santiago, Chile;
8. Department of Psychiatry, Queen's University, Kingston, ON, Canada;
9. Section of Psychiatry, Department of Medicine and Surgery, University of Parma, Parma, Italy