title: Nocturnal deaths among patients with chronic bronchitis and emphysema.
mesh_terms: D001991:Bronchitis / Q000401:mortality*; D002940:Circadian Rhythm; D004562:Electrocardiography; D006801:Humans; D000860:Hypoxia / Q000150:complications*; D011656:Pulmonary Emphysema / Q000401:mortality*