[1] Natl Canc Ctr Singapore, Div Med Oncol, Singapore, Singapore
[2] Natl Canc Ctr Singapore, Div Clin Trials & Epidemiol Sci, Singapore, Singapore
[3] Singapore Gen Hosp, Dept Mol Pathol, Singapore, Singapore
[4] Singapore Gen Hosp, Dept Orthopaed Surg, Singapore, Singapore
[5] Natl Canc Ctr Singapore, Div Surg Oncol, Singapore, Singapore
[6] Singapore Gen Hosp, Dept Anat Pathol, Singapore, Singapore