title: Limitation of supervision.
authors.forename: John
authors.initials: J
authors.lastname: Hartung
authors.forename: James E
authors.initials: JE
authors.lastname: Cottrell
mesh_terms: D000758:Anesthesia / Q000401:mortality*; D006801:Humans; D019300:Medical Errors / Q000145:classification*; D009934:Organization and Administration / Q000706:statistics & numerical data*