1. Department of Surgical Oncology; National Cancer Centre Singapore; Singapore
2. Wee Kim Wee Laboratory of Surgical Oncology; National Cancer Centre Singapore; Singapore
3. Division of Clinical Trials and Epidemiological Sciences; National Cancer Centre Singapore; Singapore
4. National Cancer Centre Singapore-VARI Translational Research Program; National Cancer Centre Singapore; Singapore
5. State Key Laboratory of Oncology; Sun Yat-sen University Cancer Centre; Guangzhou Guangzhou China
6. Department of Radiation Oncology; National Cancer Centre Singapore; Singapore