1. School of Nursing; Chang Gung University; Taoyuan Taiwan
2. Division of Gerontology; Department of Internal Medicine; Chang Gung Memorial Hospital; Taoyuan Taiwan
3. School of Public Health; Institute of Gerontology; University of Michigan; Ann Arbor Michigan USA
4. Trauma Division; Department of Orthopedics; Chang Gung Memorial Hospital; Taoyuan Taiwan
5. School of Nursing; College of Medicine; Chang Gung University; Taoyuan Taiwan
6. Healthy Aging Research Center; Chang Gung University; Taoyuan Taiwan