[1] St George Hosp, Cardiothorac Med Dept, Blackshaw Rd, London SW17 OQT, England
[2] St George Hosp, Cardiol Dept, London SW17 OQT, England
[3] St George Hosp, Radiol Dept, London SW17 OQT, England
[4] St George Hosp, Anaesthet Dept, London SW17 OQT, England
[5] St George Hosp, Cardiothorac Intens Care Dept, London SW17 OQT, England