[1] Maastricht Univ, Dept Psychiat & Psychol, Maastricht, Netherlands
[2] Kings Coll London, Dept Psychosis Studies, London, England
[3] Open Univ, Sch Psychol, Maastricht, Netherlands
[4] Netherlands Inst Mental Hlth & Addict, Utrecht, Netherlands
[5] Katholieke Univ Leuven, Univ Psychiat Ctr, Leuven, Belgium