1. Department of Chest Diseases, Hitit University School of Medicine, 19100 �orum, Turkey
2. Department of Chest Diseases, Kocaeli Derince Education and Research Hospital, 41900 Kocaeli, Turkey
3. Department of Chest Diseases, Dokuz Eyl�l University School of Medicine, 35800 İzmir, Turkey
4. Department of Chest Diseases, GATA Education and Research Hospital, 34744 İstanbul, Turkey
5. Department of Chest Diseases, Namık Kemal University School of Medicine, 59000 Tekirdağ, Turkey