[1] Educ Univ Hong Kong, Dept Hlth & Phys Educ, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Dept Social & Behav Sci, Hong Kong, Peoples R China
[3] King Juan Carlos Univ, Dept Psychol, Madrid, Spain
[4] Hong Kong Polytech Univ, Dept Appl Social Sci, Hong Kong, Peoples R China
[5] Stanford Univ, Dept Psychiat & Behav Sci, Sch Med, Stanford, CA 94305 USA
[6] Univ Calif Davis, Betty Irene Moore Sch Nursing, Davis, CA 95616 USA