Surgical Site Infection after Craniotomy in Neuro-Oncology (SINO): A protocol for an international prospective multicentre service evaluation across the United Kingdom and Ireland by Lee, KS, Borbas, B, Chaudhry, D, Kuri, A, Best, L, Gillespie, CS, Dehbi, H, Aquilina, K, Brennan, P, Plaha, P, Ashkan, K, Jenkinson, MD, Price, SJ, British Neurosurgical Trainee Research Collaborative (BNTRC), Society of British Neurological Surgeons (SBNS), Neurology and Neurosurgery Interest Group (NANSIG)