title: Canadian epidemiologists examine elective surgery.
authors: W
authors: W
authors: Kondro
mesh_terms: D002170:Canada; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D017558:Elective Surgical Procedures / Q000706:statistics & numerical data*; D016021:Epidemiologic Studies; D006801:Humans; D016896:Treatment Outcome; D019564:Unnecessary Procedures / Q000706:statistics & numerical data*