Affiliation: | 1. Polikliniek Psychiatrie , Jellinekmentrum Mental Health Care , Amsterdammahen@xs4all.nl;3. Polikliniek Psychiatrie , Jellinekmentrum Mental Health Care , Amsterdam;4. Amsterdam Institute for Addiction Research, Department of Psychiatry , Academic Medical Center, University of Amsterdam , Amsterdam;5. Department of Psychiatry , University Medical Center Groningen , Groningen, the Netherlands;6. Department of Clinical Psychology , VU University , Amsterdam |