title: Defining authorship for group studies.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Liesegang
authors.forename: Andrew P
authors.initials: AP
authors.lastname: Schachat
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Albert
mesh_terms: D001319:Authorship; D002986:Clinical Trials as Topic; D032984:Ethics, Research; D006801:Humans; D011643:Publishing / Q000592:standards*