Survey fatigue during the COVID-19 pandemic: an analysis of neurosurgery survey response rates Por de Koning, R, Egiz, A, Kotecha, J, Ciuculete, AC, Ooi, SZY, Bankole, NDA, Erhabor, J, Higginbotham, G, Khan, M, Dalle, DU, Sichimba, D, Bandyopadhyay, S, Kanmounye, US