title: Breathing space.
authors.affiliation: Naval Medical Center, San Diego, CA 92134, USA.
authors.forename: N F
authors.initials: NF
authors.lastname: Crum
authors.forename: K M
authors.initials: KM
authors.lastname: Murray
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008478:Mediastinal Emphysema / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology / Q000628:therapy; D011859:Radiography; D012307:Risk Factors