[1] Univ Bristol Sch Med, Populat Hlth Sci, Bristol, Avon, England
[2] Univ Bristol Sch Med, Translat Hlth Sci, Bristol, Avon, England
[3] Southmead Hosp, North Bristol NHS Trust, Richard Bright Renal Unit, Bristol, Avon, England
[4] Southmead Hosp, UK Renal Registry, Bristol, Avon, England
[5] Univ Exeter, Med Sch, Inst Biomed & Clin Sci, Exeter, Devon, England
[6] Bristol Royal Hosp Children, Paediat Nephrol Dept, Bristol, Avon, England