aEmergency Department, Aberdeen Royal Infirmary, NHS Grampian

bDepartment of Applied Medicine, University of Aberdeen, Aberdeen, UK

Received 11 September 2021 Accepted 12 October 2021

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Correspondence to Jamie G. Cooper, Emergency Department, Aberdeen Royal Infirmary, Aberdeen AB25 2ZN, UK, Tel: +44 1224 551817; fax: +44 1224 550718; e-mail: [email protected]