[1] Univ Hosp Maastricht, Dept Psychiat, NL-6202 AZ Maastricht, Netherlands
[2] Catholic Univ Leuven, Dept Populat Genet, Ctr Human Genet, Fac Med, Maastricht, Netherlands
[3] Maastricht Univ, EURON, S Limburg Mental Hlth Res & Teaching Network, Dept Psychiat & Neuropsychol, Maastricht, Netherlands