1. Department of Pulmonary Diseases; School of Medicine; Ataturk University; Erzurum Turkey
2. Department of Pulmonary Diseases; Marmara University; Istanbul Turkey
3. Department of Medical Education; School of Medicine; Ataturk University; Erzurum Turkey
4. Department of Medical Biology; School of Medicine; Ataturk University; Erzurum Turkey
5. Department of Radiology; School of Medicine; Ataturk University; Erzurum Turkey
6. Department of Thoracic Surgery; School of Medicine; Ataturk University; Erzurum Turkey