1. Department of Haematology-Oncology, National University Cancer Institute, Singapore
2. Cancer Science Institute of Singapore, National University of Singapore, Singapore
3. Yong Loo Lin School of Medicine, National University of Singapore, Singapore
4. Department of Radiation Oncology, National University Cancer Institute, Singapore
5. Department of General Surgery, Tan Tock Seng Hospital, Singapore
6. National Registry of Diseases Office, Health Promotion Board, Singapore
7. Department of Pathology, National University Health System, Singapore