1. From the Charing Cross Hospital (A.J.); Department of Radiology (T.B.), Imperial College Healthcare NHS Trust, London, United Kingdom; Department of Surgery and Cancer (L.D.), Faculty of Medicine, Imperial College London, United Kingdom; London North West University Healthcare NHS Trust (S.M.); Department of Brain Sciences (M.R.J.), Faculty of Medicine, Imperial College London; and Renal Department (J.A.P.T.), Imperial College Healthcare NHS Trust, London, United Kingdom.