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Journal of Adolescent Health > 1995 > 17 > 6 > 360-371
Journal of Clinical Epidemiology > 1995 > 48 > 2 > 221-228
Journal of Adolescent Health > 1995 > 17 > 6 > 360-371
Journal of Clinical Epidemiology > 1995 > 48 > 2 > 221-228