title: Change your friends.
authors.affiliation: Emory University School of Medicine, 49 Jesse Hill Jr. Drive, Atlanta, GA 30303, USA. rrothen@emory.edu
authors.forename: Richard
authors.initials: R
authors.lastname: Rothenberg
mesh_terms: D015984:Causality; D003625:Data Collection / Q000592:standards; D036262:Empirical Research; D033062:Friends; D006801:Humans; D012309:Risk-Taking; D012944:Social Support; D019966:Substance-Related Disorders / Q000453:epidemiology*