Funding for this research was provided by:
Colombian Administrative Department of Sciences, Technology and Innovation (Research contract 581-2014)
Received: 22 November 2018
Accepted: 24 March 2019
First Online: 17 April 2019
Ethics approval and consent to participate
: The institutional review board of both centers (Fundación Cardioinfantil – Instituto de Cardiología in Bogotá, and Fundación Oftalmológica de Santander - Clínica FOSCAL in Bucaramanga) approved the study protocol and (because of its nature) waived the need for individual informed consent.
: Not applicable.
: The authors’ declare that they have no competing interests.
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