%0 Journal Article %T Is Pectus Excavatum a Risk Factor for Spontaneous Pneumothorax? ¡°Haller Index Measurements in Patients with Primary Spontaneous Pneumothorax¡± %A Ali K£¿l£¿£¿g¨¹n %A Mehmet ¨¹nal %A Osman Yak£¿i %J Archive of "Canadian Respiratory Journal". %D 2019 %R 10.1155/2019/3291628 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6466956/