[1] Tech Univ Munich, German Heart Ctr, Dept Paediat Cardiol & Congenital Heart Defects, D-8000 Munich, Germany
[2] Herz Zentrum Bad Krozingen, Bad Krozingen, Germany
[3] Heidelberg Univ Clin, Dept Heart Surg, Heidelberg, Germany
[4] Univ Tubingen, Paediat Clin, Dept Paediat, D-72074 Tubingen, Germany
[5] Univ Erlangen Nurnberg, Ctr Heart Surg, D-8520 Erlangen, Germany
[6] Munster Univ Hosp, Med Clin & Policlin C, D-48129 Munster, Germany
[7] Deutsch Herzstiftung eV, Frankfurt, Germany