[1] Southmead Hosp, North Bristol NHS Trust, Bristol, Avon, England
[2] Royal Liverpool Univ Hosp, Liverpool, Merseyside, England
[3] Southmead Hosp, PHE South West Reg Lab, Bristol, Avon, England
[4] Royal United Hosp NHS Fdn Trust, Bath, Avon, England
[5] Charlotte Keel Med Practice, Bristol, Avon, England
[6] North Bristol NHS Trust, Cellular Pathol, Bristol, Avon, England
[7] Univ Bristol, Bristol Med Sch, Populat Hlth Sci, Bristol, Avon, England
[8] Univ Hosp Bristol & Weston, Unity Sexual Hlth, Bristol, Avon, England
[9] Manchester Univ NHS Fdn Trust, Manchester, Lancs, England
[10] Univ Hosp Bristol & Weston, Bristol Haematol & Oncol Ctr, Acute Oncol & Canc Unknown Primary, Bristol, Avon, England
[11] Univ Hosp Bristol & Weston, Bristol Haematol & Oncol Ctr, Acute Oncol & Canc Unknown Primary, Radiol, Bristol, Avon, England