title: Studies of cost savings require cost measurements.
authors.forename: R E
authors.initials: RE
authors.lastname: Johnstone
mesh_terms: D000762:Anesthesia Recovery Period; D003365:Costs and Cost Analysis; D017721:Hospital Costs; D006801:Humans; D010092:Oximetry; D010102:Oxygen Inhalation Therapy / Q000191:economics*; D011997:Recovery Room