Hugh S Paterson1, Paul G Bannon2, David P Taggart3. 1. Faculty of Medicine, University of Sydney, The Baird Institute of Applied Heart & Lung Surgical Research, Sydney, New South Wales, Australia. Electronic address: patersonh@aol.com. 2. Faculty of Medicine, University of Sydney, The Baird Institute of Applied Heart & Lung Surgical Research, Sydney, New South Wales, Australia. 3. Department of Cardiovascular Surgery, John Radcliffe Hospital, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom.