title: William Williams Keen, MD: 'Marshall' of American surgery and pioneer of neurosurgery.
authors.affiliation: Jefferson Medical College of Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
authors.forename: Tony I
authors.initials: TI
authors.lastname: Anene-Maidoh
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Yeo
authors.forename: Pinckney J
authors.initials: PJ
authors.lastname: Maxwell
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009493:Neurosurgery / Q000266:history*; D014481:United States