TY - JOUR A1 - Amone-P’Olak, K. A1 - Burger, H. A1 - Ormel, J. A1 - Huisman, M. A1 - Verhulst, F.C. A1 - Oldehinkel, A.J. T1 - Socioeconomic position and mental health problems in pre- and early-adolescents: The TRAILS study Y1 - 2009 DO - 10.1007/s00127-008-0424-z VL - 44 IS - 3 ER -