[1] Univ Roma La Sapienza, St Andrea Hosp, Suicide Prevent Ctr, Dept Neurosci Mental Hlth & Sensory Organs, Rome, Italy
[2] Harvard Univ, Sch Med, McLean Hosp, Boston, MA USA
[3] Semmelweis Univ, Fac Med, Dept Clin & Theoret Mental Hlth, Budapest, Hungary
[4] Semmelweis Univ, Fac Med, Dept Psychiat & Psychotherapy, Budapest, Hungary
[5] Int Mood Ctr, La Jolla, CA USA
[6] San Diego Vet Adm Med Ctr, San Diego, CA USA
[7] Univ Parma, Div Psychiat, Dept Neurosci, I-43100 Parma, Italy
[8] Mt Sinai Sch Med, Dept Psychiat, New York, NY USA
[9] Univ Pisa, Dept Psychiat, Pisa, Italy