1. Department of Pulmonary Medicine; Gazi University School of Medicine; Ankara Turkey
2. Department of Pulmonary Medicine; Turgut Ozal University; Ankara Turkey
3. Department of Biochemistry; Cerrahpasa School of Medicine; Istanbul University; Istanbul Turkey
4. Department of Pulmonary Medicine; Ordu University School of Medicine; Ordu Turkey
5. Department of Pulmonary Medicine; Ataturk Chest Disease and Chest Surgery Research and Education Hospital; Konya Turkey
6. Department of Pulmonary Medicine; Hakkari State Hospital; Hakkari Turkey
7. Department of Internal Medicine; Tatvan State Hospital; Bitlis Turkey