1. Department of Accident and Emergency, Queen Mary Hospital, Pokfulam, Hong Kong
2. Emergency Medicine Unit, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
3. Fire and Ambulance Services Academy, Hong Kong Fire Services Department, Tseung Kwan O, Hong Kong
4. Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
5. Division of Cardiology, Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong