Anthony M H Ho1, Po T Chui2, Alex P W Lee3, Song Wan4. 1. Professor, Department of Anesthesiology and Perioperative Medicine, Queen's University and Kingston General Hospital, Kingston, ON, Canada hoamh@hotmail.com. 2. Consultant, Department of Anaesthesia and Intensive Care, Prince of Wales Hospital, Shatin, NT, Hong Kong. 3. Assistant Professor, Division of Cardiology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, NT, Hong Kong. 4. Professor, Division of Cardiothoracic Surgery, Department of Surgery, The Chinese University of Hong Kong, Shatin, NT, Hong Kong.