| Affiliation: | (1) School of Nursing, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan;(2) School of Public Health, University of Michigan, 1420 Washington Heights, M3234, SPH II, Ann Arbor, MI 48109-2029, USA;(3) Institute of Gerontology, University of Michigan, 300 North Ingalls, 9th Floor, Ann Arbor, MI 48109-2007, USA;(4) Traumatological Division, Department of Orthopedics, Chang Gung Memorial Hospital, 5 Fu-Hsin Street, Kwei-Shan, Taoyuan 333, Taiwan;(5) Department of Internal Medicine, Chang Gung Memorial Hospital, 5 Fu-Hsin Street, Kwei-Shan, Taoyuan 333, Taiwan;(6) Department of Public Health & Biostatistics Consulting Center, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 333, Taiwan |
