1. Department of Geriatrics and Gerontology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
2. Department of Nursing, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
3. Department of Family Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
4. Department of Gerontological and Long-Term Care Business, Fooyin University, Kaohsiung 831, Taiwan
5. Department of Medicine & Institute of Gerontology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
6. Department of Nursing, National Tainan Junior College of Nursing, Tainan 700, Taiwan