1. From University College London (UCL) and UCL Hospitals NHS Foundation Trust (V.K., C.A., F.G., A.F., S.M., S.P., M.E., C.M.M.), London North West Healthcare NHS Trust (G.H.), Whittington Health NHS Trust (M.G.), Royal Free London NHS Foundation Trust (P.B.S.), and UCL Surgical and Interventional Trials Unit (N.R.W., C.B.-G.), London, Hampshire Hospitals NHS Foundation Trust, Basingstoke (R.G.H.), Princess Alexandra Hospital NHS Trust, Harlow (J.V.), and the Institute of Applied Health Research and the...