[1] Hong Kong Polytech Univ, Hong Kong, Hong Kong, Peoples R China
[2] Univ Hong Kong, Dept Social Work & Social Adm, Hong Kong, Hong Kong, Peoples R China
[3] Univ Hong Kong, Dept Psychiat, Hong Kong, Hong Kong, Peoples R China
[4] Hosp Author, Queen Elizabeth Hosp, Dept Obstet & Gynaecol, Hong Kong, Hong Kong, Peoples R China