1. Department of Internal Medicine Ataturk University Hospital Erzurum Turkey
2. Department of Internal Medicine, Division of Geriatrics Ataturk University Hospital Erzurum Turkey
3. Erzurum Regional Training and Research Hospital, Infectious Diseases Clinic Erzurum Turkey
4. Department of Cardiology Ataturk University Hospital Erzurum Turkey
5. Department of Internal Medicine, Division of Nephrology Ataturk University Hospital Erzurum Turkey
6. Department of Internal Medicine, Division of Geriatrics Ege University Hospital Izmir Turkey