1. Division of Chemical Pathology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
2. Accident and Emergency Department, Queen Mary Hospital, Hong Kong, China
3. Emergency Medicine Unit, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
4. Division of Anatomical Pathology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
5. Division of Gastroenterology & Hepatology, Department of Medicine, The University of Hong Kong, Hong Kong, China
6. Department of Pathology, The University of Hong Kong, Hong Kong, China