1. Istanbul Medical School, Department of Internal Medicine, Division of Geriatrics, Istanbul University, Istanbul, Turkey;
2. Department of Internal Medicine, Division of Geriatrics, Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey;
3. Istanbul Medical School, Department of Internal Medicine, Istanbul University, Istanbul, Turkey;
4. Erzurum Provincial Health Directorate, Public Health Services Presidency, Erzurum, Turkey