title: Determining the necessity for routine preoperative laboratory tests and x-rays: a cooperative PSRO/hospital study.
mesh_terms: D001772:Blood Cell Count; D019411:Clinical Laboratory Techniques / Q000706:statistics & numerical data; D003955:Diagnostic Tests, Routine; D006801:Humans; D011300:Preoperative Care / Q000191:economics / Q000592:standards*; D011366:Professional Review Organizations; D011517:Prothrombin Time; D011787:Quality of Health Care; D013902:Radiography, Thoracic / Q000706:statistics & numerical data; D014556:Urine / Q000032:analysis