1. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, USA
2. Department of Occupational Therapy, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
4. Department of Family Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
5. Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA
6. Department of Otolaryngology-Head and Neck Surgery, Taichung Veterans General Hospital, Taichung, Taiwan
7. Department of Mathematics and Statistics, Boston University, Boston, MA, USA
8. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA