[1] Univ Nottingham, Acad Unit Lifespan & Populat Hlth, Sch Med, Nottingham, England
[2] SPECTRUM Consortium, Edinburgh, Midlothian, Scotland
[3] Manchester Univ NHS Fdn Trust, Wythenshaw Hosp, Manchester, Lancs, England
[4] Leeds Teaching Hosp NHS Trust, Leeds, W Yorkshire, England