British Journal of Anaesthesia British Journal of Anaesthesia, Oxford University Press (OUP), 2020, 124 (3), pp.292-298. ⟨10.1016/j.bja.2019.11.020⟩ British Journal of Anaesthesia, 2020, 124 (3), pp.292-298. ⟨10.1016/j.bja.2019.11.020⟩ British Journal of Anaesthesia, Vol. 24, no. 3, p. 292-298 (2020)