1. Department of Surgery; National University Health System; 1E Kent Ridge Road Singapore 119228 Singapore
2. Saw Swee Hock School of Public Health; National University of Singapore; Tahir Foundation Building, 12 Science Drive 2 Singapore 117549 Singapore
3. Department of Hematology Oncology; National University Health System; 1E Kent Ridge Road Singapore 119228 Singapore
4. Julius Centre University Malaya; Faculty of Medicine; University of Malaya; Kuala Lumpur 50603 Malaysia
5. Department of Surgery; Faculty of Medicine; University of Malaya; Kuala Lumpur 50603 Malaysia
6. Department of Surgery; Tan Tock Seng Hospital; 11 Jalan Tan Tock Seng Singapore 308433 Singapore
7. Breast Department; KK Women's and Children's Hospital; 100 Bukit Timah Road Singapore 229899 Singapore
8. Department of Medical Oncology; National Cancer Centre Singapore; 11 Hospital Drive Singapore 169610 Singapore
9. Department of Pathology; Singapore General Hospital; 20 College Road Singapore 169856 Singapore
10. Division of Surgical Oncology; National Cancer Centre Singapore; 11 Hospital Drive Singapore 169610 Singapore
11. Division of Radiation Oncology; National Cancer Centre Singapore; 11 Hospital Drive Singapore 169610 Singapore
12. Department of Surgery; National University of Singapore and National University Health System; 1E Kent Ridge Road Singapore 119228 Singapore