title: [Application of double-level non-invasive positive ventilation in rehabilitation of patients with coal workers' pneumoconiosis].
authors.forename: Le-zhi
authors.initials: LZ
authors.lastname: Hou
authors.forename: Qun
authors.initials: Q
authors.lastname: Zhang
authors.forename: Chuan-gui
authors.initials: CG
authors.lastname: Wang
mesh_terms: D000368:Aged; D003032:Coal Mining; D006801:Humans; D008297:Male; D011009:Pneumoconiosis / Q000534:rehabilitation*; D011175:Positive-Pressure Respiration / Q000379:methods*