TY - RPRT A1 - Harris, K.M. A1 - Halpern, C.T. A1 - Whitsel, E. A1 - Hussey, J. A1 - Tabor, J. A1 - Entzel, P. A1 - Udry, J.R. T1 - The National Longitudinal Study of Adolescent to Adult Health: Research design Y1 - 2009 UR - http://www.cpc.unc.edu/projects/addhealth/design ER -