Ihsan M. Salloum, Professor of Psychiatry and Director, Division of Alcohol and Substance Abuse: Treatment and Research, University of Miami Miller School of Medicine, FL, USA; Section on Classification, Diagnostic Assessment and Nomenclature, World Psychiatric Association.Juan E. Mezzich, Past President, World Psychiatric Association; Professor of Psychiatry and Director, Division of Psychiatric Epidemiology, International Center for Mental Health, Mount Sinai School of Medicine, New York University, NY, USA.