Cardiovascular Division;
Hospital of the University of Pennsylvania;
Philadelphia;
PA 19104;
United States;
Cardiothoracic Department;
University Hospital of Udine;
Udine 33100;
Italy;
NorthWest Cardiac Imaging Centre;
Wythenshawe Hospital;
Manchester University NHS Foundation Trust;
Manchester M23 9LT;
United Kingdom;
Flinders University;
Bedford Park;
Adelaide 5042;
South Australia;
Australia;