aUniversity of Chicago, Anesthesia & Critical Care, Chicago, Illinois, USA

bDepartment of Anaesthesiology & Perioperative Medicine, Alfred Health, Melbourne, Victoria, Australia

Correspondence to Jarva Chow, MD, MS, MPH, University of Chicago, Anesthesia & Critical Care, 5841 S. Maryland |Rm-252-C, MC4028, Chicago, IL 60637, USA. Tel: +1 773 834 5638; e-mail: [email protected]