[1] Princess Margaret Hosp, Chem Pathol Lab, Dept Pathol, Hong Kong, Hong Kong, Peoples R China
[2] Univ Hong Kong, Dept Pathol, Li Ka Shing Fac Med, Hong Kong, Hong Kong, Peoples R China
[3] Tuen Mun Hosp, Dept Clin Pathol, Hong Kong, Hong Kong, Peoples R China
[4] Princess Margaret Hosp, Dept Obstet & Gynaecol, Hong Kong, Hong Kong, Peoples R China
[5] Princess Margaret Hosp, Dept Paediat & Adolescent Med, Hong Kong, Hong Kong, Peoples R China