Schools sites for research: land of opportunity--and dilemma.
Kapphahn
C J
CJ
D000293:Adolescent; D016497:Adolescent Health Services / Q000706:statistics & numerical data; D003625:Data Collection / Q000379:methods; D006306:Health Surveys; D006801:Humans; D012106:Research; D012309:Risk-Taking; D012574:Schools