title: Response to commentary by Marcus and Gibbons.
authors.affiliation: Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
authors.forename: Jeremy A
authors.initials: JA
authors.lastname: Rassen
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Glynn
authors.forename: Kenneth J
authors.initials: KJ
authors.lastname: Rothman
authors.forename: Soko
authors.initials: S
authors.lastname: Setoguchi
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schneeweiss