RT Article T1 Longitudinal research in child and adolescent psychiatry JF Journal of the American Academy of Child and Adolescent Psychiatry VO 30 IS 3 SP 361 OP 368 A1 Verhulst, F. C. A1 Koot, H. M. A2 Koot, H. M. LA English YR 1991 UL https://krimdok.uni-tuebingen.de/Record/1640153063 K1 Jugendpsychiatrie K1 Längsschnittstudie