[1] St Georges Univ London, St Georges Univ Hosp NHS Fdn Trust, Cardiovasc Clin Acad Grp, London, England
[2] Guys & St Thomas Hosp, Ctr Cardiothorac, London, England
[3] Kings Coll London, London, England
[4] Royal Brompton & Harefield NHS Fdn Trust, Cardiovasc Res Ctr, London, England
[5] St Georges Univ London, Cardiovasc Pathol Dept, London, England