title: James Young Simpson: the controversy surrounding the presentation of his Air Tractor (1848-1849).
authors.affiliation: Department of Obstetrics and Gynaecology, Queen Mary's Hospital, Sidcup, Kent, UK.
authors.forename: D L
authors.initials: DL
authors.lastname: Eustace
mesh_terms: D005260:Female; D049672:History, 19th Century; D006801:Humans; D011247:Pregnancy; D012606:Scotland; D014620:Vacuum Extraction, Obstetrical / Q000266:history* / Q000295:instrumentation