1 Department of Neurosurgery, The Walton Centre NHS Foundation Trust, Liverpool, UK (M.D.J., R.Z.); Institute of Infection and Global Health, University of Liverpool, Liverpool, UK (M.D.J., C.L.M.); Center for Proton Therapy, Paul Scherrer Institute, Villigen, Switzerland (D.C.W.); University of Bern, Bern, Switzerland (D.C.W.); Department of Radiation Oncology, Clatterbridge Cancer Centre, Wirral, UK (B.J.H.); Department of Paediatric Neurosurgery, Alder Hey Children's Hospital, Liverpool, UK (C.L.M.); Department of Neurosurgery, Beaumont Hospital, Dublin, Ireland (M.J.).