Received: 28 December 2020
Accepted: 7 July 2021
First Online: 28 July 2021
: The study was approved by the Ethical Committee of the Fundación Cardioinfantil Instituto de Cardiología (CEIC IRB0000 No458, October 2014) and by the Ethical committee of the FOSCAL (CEI FOSCAL No60, September 2016). Written informed consent was obtained from all participants after a verbal explanation, and written information was provided.
: Not applicable.
: The authors OLC, MHG, MR, CPB, ME, and CP declare that they have no competing interests.