1. Depertment of Pulmonary Diseases, Ataturk University School of Medicine, Yakutiye, Erzurum, Turkey
2. Depertment of Pulmonary Diseases, Health Sciences University Erzurum Regional Education and Research Hospital, Erzurum, Turkey
3. Depertment of Biochamistry, Ataturk University School of Medicine, Yakutiye, Erzurum, Turkey