1. Department of Medicine and Therapeutics; Robert Kilpatrick, Clinical Sciences Building, Leicester Royal Infirmary; Leicester LE2 7LX UK
2. Department of General Practice; Leicester LE2 7LX UK
3. Department of Epidemiology; University of Leicester; Leicester LE2 7LX UK
4. Department of Cardiology; Glenfield Hospital; Leicester LE2 7LX UK