title: Presidential address: enduring mission--continuing challenges.
authors.affiliation: Department of Surgery, Tufts University School of Medicine, Boston, Mass., 02111, USA. todonnell@lifespan.org
authors.forename: Thomas F
authors.initials: TF
authors.lastname: O'Donnell
mesh_terms: D006801:Humans; D012955:Societies, Medical / Q000458:organization & administration* / Q000639:trends*; D014656:Vascular Surgical Procedures / Q000458:organization & administration* / Q000639:trends*