Funding for this research was provided by:
Instituto de Salud Carlos III (PI12/01104, PI15/01262)
Received: 11 February 2018
Accepted: 16 October 2018
First Online: 8 November 2018
Ethics approval and consent to participate
: Informed consent was obtained from the patients (or their parents) to analyse and publish their data. The study was performed in accordance with the instructions and requirements expressed in the international standards for studies of the Declaration of Helsinki and approved by the Ethics Committee of Vall d’Hebron Hospital (CEIC).
: Not applicable.
: The authors declare that they have no competing interests.
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