1. Department of Anaesthesia, Pain and Perioperative Medicine, Queen Mary Hospital, Hong Kong SAR, China
2. Department of Intensive Care, Pamela Youde Nethersole Eastern Hospital, Hong Kong SAR, China
3. Department of Anaesthesia and Intensive Care, Tuen Mun Hospital, Hong Kong SAR, China
4. Department of Intensive Care, Queen Elizabeth Hospital, Hong Kong SAR, China