[1] Chinese Univ Hong Kong, Prince Wales Hosp, Dept Anat & Cellular Pathol, Shatin, Hong Kong, Peoples R China
[2] Natl Univ Singapore, Dept Pathol, Singapore 117548, Singapore
[3] Univ Sydney, Dept Pathol, Fac Med, Sydney, NSW 2006, Australia
[4] Singapore Gen Hosp, Dept Pathol, Singapore 119074, Singapore