1. Department of Pathology, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China.
2. Department of Pathology, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China; and, Department of Pathology, International Peace Maternity and Child Health Hospital, the University of Jiao Tong, Shanghai, China.
3. Department of Pathology, Peking University School of Oncology, Beijing Cancer Hospital & Institute, China.