[1] Massachusetts Gen Hosp, Dept Psychiat, Boston, MA 02114 USA
[2] Hosp Clin Porto Alegre, Serv Psiquiatria, Rua Ramiro Barcelos, Porto Alegre, RS, Brazil
[3] Sapienza Univ, Dept Neurosci, Rome, Italy
[4] Sapienza Univ, Dept Mental Hlth, Rome, Italy
[5] Sapienza Univ, Dept Sensory Organs, Rome, Italy
[6] St Andrea Hosp, Fac Med & Psychol, Via Grottarossa, Rome, Italy
[7] St Andrea Hosp, Unit Psychiat, Via Grottarossa, Rome, Italy
[8] Massachusetts Gen Hosp, Dept Psychiat, Depress Clin & Res Program, Boston, MA 02114 USA
[9] Massachusetts Gen Hosp, Dept Psychiat, Ctr Anxiety & Traumat Stress Disorders, Boston, MA 02114 USA