Department of Anaesthesia and Pain Management, Royal Melbourne Hospital, Melbourne,Australia, and Department of Pharmacology, University of Melbourne, Melbourne, Australia;
Department of Anaesthesia and Perioperative Medicine, Alfred Hospital, Melbourne, Australia,and Academic Board of Anaesthesia and Perioperative Medicine, Monash University, Melbourne,Australia;
Department of Anaesthesia, Prince of Wales Hospital, Hong Kong, People's Republic of China, and Department of Anaesthesia, Chinese University of Hong Kong, People's Republic of China;
Department of Epidemiology and Preventive Medicine, Monash University,Melbourne, Australia;
School of Medicine and Pharmacology, University of Western Australia,Perth Australia, and Department of Anaesthesia and Pain Medicine, King Edward Memorial Hospital for Women, Perth, Australia;
Department of Anaesthesia, Austin Hospital,Melbourne, Australia, and Dept of Surgery, Austin Hospital and University of Melbourne,Melbourne, Australia;
Department of Anaesthesia St, Vincent's Hospital, Melbourne, Australia Department of Surgery, University of Melbourne, Melbourne, Australia;
Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia;