1 Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany. Electronic address: hannes.sallmon@charite.de.
2 Department of Pediatric Cardiology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Pediatric Cardiology/Congenital Heart Disease, German Heart Center Berlin (DHZB), Berlin, Germany.
3 Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
4 Division of Pediatric Cardiology, Medical University of Graz, Graz, Austria.
5 Department of Pediatric Cardiology and Critical Care, Hannover Medical School, Hannover, Germany.
6 Department of Pediatric Cardiology, Charité - Universitätsmedizin Berlin, Berlin, Germany.