Affiliation: | W.T. McBride, BSc, MD, FRCA, FFARCSI, Senior Registrar, Department of Anaesthetics, Royal Victoria Hospital, Belfast BT12 6BN.;M.A. Armstrong, PhD, Lecturer, Department of Microbiology and Immunobiology, Royal Victoria Hospital, Belfast BT12 6BN.;T.J. McMurray, MD, FRCA Consultant Cardiac Anaesthetist, Royal Victoria Hospital, Belfast BT12 6BN. |