[1] Katholieke Univ Leuven, Acad Ctr Gen Practice, Kapucijnenvoer 33,Blok J, B-3000 Leuven, Belgium
[2] Vrije Univ Brussel, UZ Brussel, Dept Psychiat, Laarbeeklaan 101, B-1090 Brussels, Belgium
[3] VAD Flemish Ctr Expertise Alcohol & Other Drugs, Vanderlindenstr 15, B-1030 Schaarbeek Brussels, Belgium