Poon MTC, Piper RJ, Thango N, Fountain DM, Marcus HJ, Lippa L, Servadei F, Esene IN, Freyschlag CF, Neville IS, Rosseau G, Schaller K, Demetriades AK, Robertson FC, Hutchinson PJ, Price SJ, Baticulon RE, Glasbey JC, Bhangu A, Jenkinson MD, Kolias AG, Writing Group of the COVIDSurg-Cancer neurosurgery investigators on behalf of the COVIDSurg Collaborative; British Neurosurgical Trainee Research Collaborative; WFNS Young Neurosurgeons Committee; NIHR Global Health Research Group on Acquired Brain and Spine Injury