title: Erratum to: Methodological Approaches to Evaluate the Impact of FDA Drug Safety Communications.
authors.affiliation: Program on Regulation, Therapeutics, and Law (PORTAL), Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Suite 3030, 1620 Tremont Street, Boston, MA, 02120, USA, akesselheim@partners.org.
authors.forename: Aaron S
authors.initials: AS
authors.lastname: Kesselheim
authors.forename: Eric G
authors.initials: EG
authors.lastname: Campbell
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schneeweiss
authors.forename: Paula
authors.initials: P
authors.lastname: Rausch
authors.forename: Brian M
authors.initials: BM
authors.lastname: Lappin
authors.forename: Esther H
authors.initials: EH
authors.lastname: Zhou
authors.forename: John D
authors.initials: JD
authors.lastname: Seeger
authors.forename: John S
authors.initials: JS
authors.lastname: Brownstein
authors.forename: Steven
authors.initials: S
authors.lastname: Woloshin
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Schwartz
authors.forename: Timothy
authors.initials: T
authors.lastname: Toomey
authors.forename: Gerald J
authors.initials: GJ
authors.lastname: Dal Pan
authors.forename: Jerry
authors.initials: J
authors.lastname: Avorn