1. Department of Chest Diseases, Dumlupınar University School of Medicine, 43100 Kütahya, Turkey
2. Department of Chest Diseases, Duzce University School of Medicine, 81000 Düzce, Turkey
3. Department of Critical Care, Hacettepe University School of Medicine, 06100 Ankara, Turkey
4. Department of Biochemistry, Balıkesir University School of Medicine, 10145 Balıkesir, Turkey
5. Department of Chest Diseases, Antakya State Hospital, 3100 Antakya, Turkey