RT Article T1 Classroom-based surveys of adolescent risk-taking behaviors: Reducing the bias of absenteeism JF American journal of public health VO 92 IS 2 A1 Guttmacher, Sally A2 Weinberg, Sharon Lawner 1947- A2 Kapadia, Farzana A2 Weitzman, Beth C. 1957- LA English YR 2002 UL https://krimdok.uni-tuebingen.de/Record/1912481189 DO 10.2105/AJPH.92.2.235