1. The Hebrew University of Jerusalem, Jerusalem, Israel;
2. Department for the Treatment of Substance Abuse, Ministry of Health, The Hebrew University of Jerusalem, Jerusalem, Israel;
3. Jerusalem Mental Health Center, The Hebrew University of Jerusalem, Jerusalem, Israel;
4. Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel;
5. Hebrew University-Hadassah Braun School of Public Health & Community Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel