*Anaesthesia Department, Royal Hallamshire Hospital
†International Academy of Paediatric Endoscopy Training, Sheffield Children's Hospital NHS Foundation Trust Sheffield, Sheffield, UK.
Address correspondence and reprint requests to David Turnbull, BM, FRCA, PhD, Anaesthetic Department, Royal Hallamshire Hospital, Sheffield S10 2JF, UK (e-mail: David.email@example.com).
Received 24 May, 2019
Accepted 26 May, 2019
The authors report no conflicts of interest.