- Correspondence to Dr Heynric B Grotenhuis, Pediatric Cardiology, Universitair Medisch Centrum Utrecht-Locatie Wilhelmina Kinderziekenhuis, Utrecht 3508 AB, The Netherlands;
- Received January 11, 2017
- Revised March 6, 2017
- Accepted March 15, 2017
- First published April 4, 2017.
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