[1] Queens Univ Belfast, Patrick G Johnston Ctr Canc Res, Belfast, North Ireland
[2] Golden Jubilee Natl Hosp, Gen Surg Dept, Glasgow City, Scotland
[3] Univ Bristol, Ctr Surg Res, Bristol Med Sch, Dept Populat Hlth Sci, London, England
[4] Independent Canc Patients Voice, London, England
[5] Univ Bristol Sch Med, Bristol Surg & Perioperat Care Complex Intervent C, Bristol, England
[6] North Bristol NHS Trust, Bristol Breast Care Ctr, Bristol, England