[1] Stoke Mandeville Hosp, Dept Cardiol, Aylesbury, Bucks, England
[2] Oxford Univ Hosp NHS Trust, Dept ACHD Cardiol, Oxford, England
[3] Oxford Univ Hosp NHS Trust, Oxford Ctr Diabet Endocrinol & Metab, Dept Endocrinol, Oxford, England
[4] Fiona Stanley Hosp, Adv Heart Failure & Cardiac Transplant Serv, Perth, WA, Australia