title: O'Malley and Johnston respond.
authors: Patrick M. O'Malley and Lloyd D. Johnston are with the Survey Research Center, Institute for Social Research, University of Michigan, Ann Arbor.
authors: Patrick M
authors: PM
authors: O'Malley
authors: Lloyd D
authors: LD
authors: Johnston
mesh_terms: D000428:Alcohol Drinking / Q000453:epidemiology*; D001334:Automobile Driving / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D013334:Students; D019966:Substance-Related Disorders / Q000453:epidemiology*