1. Department of Anaesthesia and Intensive Care and Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin and Department of Community Medicine, Faculty of Medicine Building, University of Hong Kong, Pokfulam, Hong Kong
2. Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong.
3. Research Student, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong.
4. Assistant Professor, Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong.
5. Lecturer, Department of Community Medicine, Faculty of Medicine Building, University of Hong Kong, Pokfulam, Hong Kong.
6. Professor of Clinical Pharmacology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong.