title: Reply from the authors.
authors.affiliation: Madrid, Spain ngaruttimartinez@yahoo.es.
authors.forename: I
authors.initials: I
authors.lastname: Garutti
authors.affiliation: Madrid, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Puente-Maestu
mesh_terms: D045422:Continuous Positive Airway Pressure / Q000379:methods*; D005260:Female; D006801:Humans; D008168:Lung / Q000503:physiopathology* / Q000601:surgery*; D008297:Male; D008397:Masks; D010100:Oxygen / Q000008:administration & dosage*; D011182:Postoperative Care / Q000379:methods*; D011659:Pulmonary Gas Exchange / Q000502:physiology*
chemical_list: D010100:Oxygen