title: Should systematic reviewers search for randomized, controlled trials published as letters?
authors.forename: Alla E
authors.initials: AE
authors.lastname: Iansavichene
authors.forename: Margaret
authors.initials: M
authors.lastname: Sampson
authors.forename: Jessie
authors.initials: J
authors.lastname: McGowan
authors.forename: Isola S Y
authors.initials: IS
authors.lastname: Ajiferuke
mesh_terms: D015709:Correspondence as Topic; D016239:MEDLINE; D011643:Publishing; D016032:Randomized Controlled Trials as Topic