[1] Univ Hong Kong, Dept Nursing Studies, Hong Kong, Hong Kong, Peoples R China
[2] Univ Calif Irvine, Dept Psychiat, Irvine, CA 92717 USA
[3] Pamela Youde Nethersole Eastern Hosp, Dept Med, Hong Kong, Hong Kong, Peoples R China
[4] Queen Mary Hosp, Dept Psychiat, Hong Kong, Hong Kong, Peoples R China