title: [Pay more attention to the similarities and differences of nocturnal hypoxia of chronic obstructive pulmonary disease and overlap syndrome].
authors.forename: Hui-guo
authors.initials: HG
authors.lastname: Liu
authors.forename: Yong-jian
authors.initials: YJ
authors.lastname: Xu
mesh_terms: D002940:Circadian Rhythm; D006801:Humans; D000860:Hypoxia; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications* / Q000175:diagnosis; D020181:Sleep Apnea, Obstructive / Q000150:complications* / Q000175:diagnosis