a1 Department of Paediatric Cardiology Justus-Liebig University Giessen, Germany
a2 Department of Paediatric Cardiology Medical University of Vienna Vienna, Austria
(Received May 28 2011)
(Accepted April 15 2012)
(Online publication May 22 2012)
Correspondence:
c1 Correspondence to: Dr Dietmar Schranz, Department of Paediatric Cardiology, Justus-Liebig University, Feulgenstrasse 12, 35385 Giessen, Germany; E-mail: dietmar.schranz@paediat.med.uni-giessen.de