1. The Hong Kong Polytechnic University; School of Nursing; School of Nursing The Hong Kong Polytechnic University Hung Hom Hong Kong
2. Alice Ho Miu Ling Nethersole Hospital; Department of Medicine; 11 Chuen On Road Tai Po New Territories Hong Kong SAR China
3. Prince of Wales Hospital, The Chinese University of Hong Kong; Department of Medicine and Therapeutics; Shatin Hong Kong SAR China
4. University of Southern California; School of Social Work; 669 W. 34th St Los Angeles CA USA 90089-0411