title: Erratum to: Nonmedical prescription drug use among US young adults by educational attainment.
authors.affiliation: Department of Epidemiology, Mailman School of Public Health, 722 West 168th Street, Rm. 509, New York, NY, 10032, USA, ssm2183@columbia.edu.
authors.forename: Silvia S
authors.initials: SS
authors.lastname: Martins
authors.forename: June H
authors.initials: JH
authors.lastname: Kim
authors.forename: Lian-Yu
authors.initials: LY
authors.lastname: Chen
authors.forename: Deysia
authors.initials: D
authors.lastname: Levin
authors.forename: Katherine M
authors.initials: KM
authors.lastname: Keyes
authors.forename: Magdalena
authors.initials: M
authors.lastname: Cerdá
authors.forename: Carla L
authors.initials: CL
authors.lastname: Storr