Authors' reply.
Department of Pediatric Cardiology, Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands.
Matthias W
MW
Freund
Department of Pediatric Cardiology, Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands.
Martijn H T
MH
den Dekker
Department of Pediatric Cardiology, Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands.
A Christian
AC
Blank
Department of Pediatric Cardiology, Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands.
Felix
F
Haas
Department of Pediatric Cardiology, Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands.
Martijn G
MG
Slieker
D000465:Algorithms; D001021:Aortic Valve / Q000000981:diagnostic imaging*; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D018636:Hypoplastic Left Heart Syndrome / Q000000981:diagnostic imaging*; D008297:Male; D008943:Mitral Valve / Q000000981:diagnostic imaging*