1. Wessex Cardiothoracic Centre; Southampton General Hospital; Mailpoint 46, Tremona Road Southampton SO16 6YD UK
2. Department of Cardiology, Castle Hill Hospital; University of Hull; Kingston upon Hull HU5 7RX UK
3. Royal Brampton Hospital; Sydney Street London SW3 6NP UK
4. Department of Cardiology; Western Infirmary; Glasgow G11 6NT UK
5. Medical Research Council Clinical Research Initiative in Heart Failure; University of Glasgow; Glasgow G12 8QQ UK