RT Article T1 How early is too early? Identification of elevated, persistent problem behavior in childhood JF Prevention science VO 21 IS 4 SP 445 OP 455 A1 Augustyn, Megan A2 Henry, Kimberly L. A2 Thornberry, Terence P. A2 Philippi, Pilar A2 Loughran, Thomas LA English YR 2020 UL https://krimdok.uni-tuebingen.de/Record/1912577364 DO 10.1007/s11121-019-01060-y