1. Liverpool Reviews and Implementation Group; University of Liverpool; Liverpool UK
2. Department of Anaesthesia and Intensive Care; The Chinese University of Hong Kong; Shatin Hong Kong
3. Hong Kong Branch of The Chinese Cochrane Centre; The Jockey Club School of Public Health and Primary Care; The Chinese University of Hong Kong; Shatin Hong Kong
4. Patient Safety Research Unit; Royal Lancaster Infirmary; Lancaster UK
5. Department of Anaesthesia; Royal Lancaster Infirmary; Lancaster UK