1Department of Chest Diseases, School of Medicine, Ankara University, Ankara, Turkey, E-mail: OğuzKöktürk@yahoo.com
2Department of Chest Diseases, School of Medicine, Gazi University, Sleep Medicine Unit, Ankara, Turkey, E-mail: OğuzKöktürk@yahoo.com
3Department of Biochemistry, School of Medicine, Gazi University, Ankara, Turkey, E-mail: OğuzKöktürk@yahoo.com
4Department of Statistics, School of Medicine, Ankara University, Ankara, Turkey, E-mail: OğuzKöktürk@yahoo.com
*Corresponding Author:
Nalan Demir, MD, Department of Pulmonary Medicine, School of Medicine, Ankara University, 06100 Cebeci-Ankara, Turkey, Tel: 903125957077, Fax: 903123190046 Email: