1. Department of Molecular and Clinical Medicine, Institution of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Department of Internal Medicine, Skaraborg Hospital, Lidköping, Sweden
3. Division of Periodontology, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden,
4. Department of Physiology, Faculty of Medicine, Süleyman Demirel University, Isparta, Turkey
5. Department of Pulmonary Medicine, Marmara University, Istanbul, Turkey