1. Dunedin Hospital; Department of Anaesthesia & Intensive Care; Great King Street Dunedin New Zealand Private Bag 192
2. St Vincent's University Hospital; Department of Anaesthesia and Intensive Care Medicine; Elm Park Dublin Ireland 4
3. Dunedin School of Medicine, University of Otago; Department of Preventive & Social Medicine; PO Box 913 Dunedin New Zealand 9054
4. University of Otago; Department of Medicine; Dunedin School of Medicine PO Box 913 Dunedin New Zealand 9015
5. Rigshospitalet; The Cochrane Anaesthesia Review Group; Blegdamsvej 9, Afsnit 5211, rum 1204 Copenhagen Denmark 2100
6. Princess Alexandra Hospital; Department of Anaesthesia; Ipswich Road Woolloongabba Brisbane Australia 4102
7. St Vincent's University Hospital; Department of Anaesthesia; Elm Park Dublin Ireland 4