[1] Kings Coll London, MRC Social Genet & Dev Psychiat Ctr, Inst Psychiat, London WC2R 2LS, England
[2] Rhein Freidrich Wilhelms Univ Bonn, Dept Psychiat, D-53113 Bonn, Germany
[3] Cent Inst Mental Hlth, Div Genet Epidemiol Psychiat, D-6800 Mannheim, Germany
[4] Karol Marcinkowski Univ Med Sci, Lab Psychiat Genet, Poznan, Poland
[5] Aarhus Univ Hosp, Dept Psychiat, Risskov, Denmark
[6] Inst Publ Hlth, Dept Psychiat, Ljubljana, Slovenia
[7] Univ Zagreb, Croat Inst Brain Res, Zagreb 41000, Croatia
[8] Ctr San Giovanni Dio FBF, Biol Psychiat Unit, Brescia, Italy
[9] Dual Diago Ward IRCCS, Brescia, Italy
[10] Free Univ Brussels, Dept Psychiat, Brussels, Belgium