[1] Univ Groningen, Univ Med Ctr Groningen, Dept Psychiat, Groningen, Netherlands
[2] Parnassia Psychiat Inst, The Hague, Netherlands
[3] Maastricht Univ, Dept Psychiat & Neuropsychol, Maastricht, Netherlands
[4] Vrije Univ Amsterdam, Dept Clin Psychol, Amsterdam, Netherlands
[5] Kings Coll London, Kings Hlth Partners, Dept Psychosis Studies, Inst Psychiat, London, England