1. Department of Internal Medicine, Gulhane Faculty of Medicine & Gulhane Training and Research Hospital, University of Health Sciences, Ankara, Turkey
2. Department of Geriatrics, Gulhane Training and Research Hospital, Ankara, Turkey
3. Department of Geriatrics, Gulhane Faculty of Medicine & Sultan Abdulhamid Han Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
4. Department of Geriatrics, Gulhane Faculty of Medicine & Gulhane Training and Research Hospital, University of Health Sciences, Ankara, Turkey