Text and Data Mining valid from 2019-10-12
Received: 30 April 2019
Accepted: 5 September 2019
First Online: 12 October 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Comité Ético Cientifico, Servicio de Salud Metropolitano Oriente, permits 20150407 and 20170307) and with the principles of the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.