[1] Univ Surrey, Sch Hlth Sci, Kate Granger Bldg,30 Priestley Rd, Guildford GU2 7YH, England
[2] Univ Oulu, Fac Educ, Oulu, Finland
[3] NHS England, Natl Dis Registrat Serv, London, England
[4] Kings Coll London, Ctr Canc Soc & Publ Hlth, Comprehens Canc Ctr, Canc Epidemiol & Canc Serv Res, London, England
[5] Revolving Doors Agcy, 90 London Rd, London SE1 6LN, England
[6] Univ Southampton, Fac Med, Southampton, England
[7] Univ Coll London Hosp NHS Fdn Trust, Ctr Nurse Midwife & Allied Hlth Profess Res CNMAR, London, England
[8] UCL, Inst Epidemiol & Hlth, Appl Hlth Res, London, England