[1] Department of Child Psychiatry,
[2] Turku University Hospital,undefined
[3] FIN-20520 Turku,undefined
[4] Finland Fax: +358-2-2612412 e-mail: andre.sourander@utu.fi,undefined
[5] Department of Biostatistics,undefined
[6] University of Turku,undefined
[7] Turku,undefined
[8] Finland,undefined