title: [Etiological study of spontaneous pneumothorax - with special reference to the etiological mechanism of emphysematous bulla and pneumothorax].
mesh_terms: D006801:Humans; D008168:Lung / Q000473:pathology; D011030:Pneumothorax / Q000209:etiology* / Q000473:pathology; D011656:Pulmonary Emphysema / Q000209:etiology* / Q000473:pathology