Funding for this research was provided by:
INICIATIVA MILENIO (ICM P09)
CONICYT (fondecyt 1071045)
Received: 21 November 2019
Accepted: 28 January 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: The protocol was approved by the Institutional Review Board of the Faculty of Medicine of Universidad de Chile, and all the individuals signed written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.