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Biomedical and Environmental Sciences > 2009 > 22 > 2 > 130-135
Journal of Adolescent Health > 2006 > 39 > 6 > 925.e1-925.e8
Biomedical and Environmental Sciences > 2009 > 22 > 2 > 130-135
Journal of Adolescent Health > 2006 > 39 > 6 > 925.e1-925.e8