1. School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China
2. Department of Pathology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, P. R. China
3. Centre for Oncology and Immunology, Hong Kong Science Park, Hong Kong SAR, China