[1] Univ Leeds, Leeds Inst Data Analyt, Leeds, England
[2] Leeds Inst Med Res, Sch Med, Leeds, England
[3] Leeds Teaching Hosp NHS Trust, Leeds Childrens Hosp, Leeds, England
[4] Sheffield Childrens NHS Fdn Trust, Haematol & Oncol, Sheffield, England
[5] Univ Leeds, Sch Geog, Leeds, England
[6] Natl Canc Registrat & Anal Serv, NHS Digital, Oxford, England