1. Division of Geriatric Medicine, Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Sihhiye, Ankara, Turkey
2. Division of Geriatric Medicine, Department of Internal Medicine, Faculty of Medicine, Gaziantep University, Sahinbey, Gaziantep, Turkey
3. Ankara Oncology Training and Research Hospital, Psychiatry Clinic, Kolej, Ankara, Turkey