1. 1JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, People's Republic of China.
2. 2Department of Oncology, Princess Margaret Hospital, Hong Kong, People's Republic of China.
3. 3Department of Surgery, North District Hospital, Hong Kong, People's Republic of China.
4. 4Department of Pathology, North District Hospital, Hong Kong, People's Republic of China.
5. 5Department of Pathology, Yan Chai Hospital, Hong Kong, People's Republic of China.
6. 6Department of Medicine, Princess Margaret Hospital, Hong Kong, People's Republic of China.
7. 7Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China.