1. Department of Medicine (C.H., H.G., M.C.S., A.L.), University of Birmingham, Birmingham, B15 2TH, United Kingdom
2. Institute of Experimental Clinical Research (A.F.), Aarhus Kommunehospital, DK-8000 Aarhus C, Denmark
3. Lawson Research Institute (J.P., D.J.H.), St. Joseph’s Health Centre, University of Western Ontario, London, Ontario, Canada
4. Department of Medicine (C.R.T.), St. Thomas’s Hospital, London, SE1 7EH, United Kingdom