1 Central Institute of Mental Health, & Medical Faculty Mannheim/Heidelberg University, Square J5, 68159 Mannheim, Germany.
2 Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health (CIMH), University of Heidelberg, Head, J5, 68159 Mannheim, Germany.
3 Radboud University Medical Centre, Department of Psychiatry, Nijmegen, The Netherlands.
4 Collaborative Antwerp Psychiatric Research Institute (CAPRI), Antwerp University (UA, UZA), Universiteitsplein 1, 2640 Wilrijk, Belgium. Electronic address: [email protected].