[1] Univ Zurich Hosp, Ctr Cardiovasc, Andreas Gruntzig Catheterizat Labs, Dept Cardiol, CH-8091 Zurich, Switzerland
[2] Univ Childrens Hosp Zurich, Dept Cardiol, Zurich, Switzerland
[3] Univ Zurich Hosp, Ctr Cardiovasc, Dept Cardiac Surg, CH-8091 Zurich, Switzerland