[1] Univ Maryland, Med Ctr, Dept Cardiol, Div Cardiol, Baltimore, MD 21030 USA
[2] Prince Charles Hosp, Queensland Ctr Thorac Transplantat, Brisbane, Qld 4032, Australia
[3] Freeman Rd Hosp, Ctr Cardiothorac, Newcastle Upon Tyne NE7 7DN, Tyne & Wear, England
[4] Univ Newcastle, Newcastle Upon Tyne, Tyne & Wear, England
[5] Washington Univ, Sch Med, Dept Pediat, Div Allergy & Pulm Med, St Louis, MO 63110 USA
[6] Med Univ Vienna, Dept Cardiothorac Surg, Vienna, Austria
[7] Toronto Gen Hosp, Peter Munk Cardiac Ctr, Div Cardiol, Toronto, ON, Canada