Funding for this research was provided by:
Fondo de Fomento al Desarrollo Científico y Tecnológico (11121390)
Ministry of Economy, Development, and Tourism, through the Millennium Science Initiative (IS130005)
Text and Data Mining valid from 2020-03-30
Received: 26 June 2019
Accepted: 6 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: The protocol was approved by the institutional ethics committees of the School of Medicine of the Pontificia Universidad Católica de Chile and the Sótero del Río Hospital.This research had been performed in accordance with the Declaration of Helsinki. The participants were guided through the questionnaires form by specially trained evaluators. They consented by writing to participate in this research. If participants were minors, the consent form was signed by their guardian or caregiver.
: Not applicable.
: The authors declare that they have no competing interests.