1. Accident and Emergency Department, Princess Margaret Hospital, Hong Kong, Hong Kong SAR;
2. Department of Emergency Medicine, Victorian Poisons Information Centre, Austin Toxicology Service, Austin Health, Melbourne, Australia;
3. Department of Medicine and Radiology, Centre for Integrated Critical Care, Melbourne Medical School, University of Melbourne, Melbourne, Australia;
4. Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Melbourne, Australia