1. Clinical Services Directorate, Ramón de la Fuente Muñiz National Institute of Psychiatry, Mexico
2. Teaching Department, Médica Sur Hospital, Mexico
3. University of California, San Diego, USA and Center of Excellence for Stress and Mental Health, VA San Diego Healthcare System, USA
4. Clinical Research Directorate, Ramón de la Fuente Muñiz National Institute of Psychiatry, Mexico