1 Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong.
2 Department of Clinical Oncology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong.
3 Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong. Electronic address: joshuali@cuhk.edu.hk.