title: The authors reply.
authors.affiliation: Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, NY Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY Center for Injury Epidemiology and Prevention, Columbia University, New York, NY.
authors.forename: Guohua
authors.initials: G
authors.lastname: Li
authors.affiliation: Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, NY Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY Center for Injury Epidemiology and Prevention, Columbia University, New York, NY.
authors.forename: Joanne E
authors.initials: JE
authors.lastname: Brady
mesh_terms: D000063:Accidents, Traffic / Q000401:mortality*; D001334:Automobile Driving / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D019966:Substance-Related Disorders / Q000453:epidemiology*