title: Response.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Baria
authors.forename: Andrea J
authors.initials: AJ
authors.lastname: Boon
authors.forename: Kaiser G
authors.initials: KG
authors.lastname: Lim
mesh_terms: D003964:Diaphragm / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000000981:diagnostic imaging*; D014463:Ultrasonography / Q000379:methods*