1. Sau Po Centre on Aging, University of Hong Kong, Hong Kong, People's Republic of China,
2. Sau Po Centre on Aging, University of Hong Kong, Hong Kong, People's Republic of China
3. University of Macau, Macau, and Sau Po Centre on Aging, University of Hong Kong, Hong Kong, People's Republic of China
4. St. James' Settlement, Hong Kong, and Sau Po Centre on Aging, University of Hong Kong, Hong Kong, People's Republic of China
5. University of Southern California, Los Angeles