- Correspondence to Dr Heynric B Grotenhuis, Pediatric Cardiology, Universitair Medisch Centrum Utrecht - Locatie Wilhelmina Kinderziekenhuis, Utrecht 3584 EA, The Netherlands;
- Received August 13, 2019
- Revised November 8, 2019
- Accepted November 20, 2019
- First published December 19, 2019.
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