title: Erratum to: A systematic review of risk and protective factors associated with nonmedical use of prescription drugs among youth in the United States: a social ecological perspective.
authors.affiliation: Department of Psychiatry, Harvard Medical School/Massachusetts General Hospital, Boston, Massachusetts.
authors.forename: Jessica E
authors.initials: JE
authors.lastname: Nargiso
authors.affiliation: Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, Massachusetts.
authors.forename: Erica L
authors.initials: EL
authors.lastname: Ballard
authors.affiliation: Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston, Massachusetts, Department of Social and Behavioral Sciences, Harvard School of Public Health, Boston, Massachusetts.
authors.forename: Margie R
authors.initials: MR
authors.lastname: Skeer