Valladales-Restrepo, Luis Fernando http://orcid.org/0000-0002-4245-0101
Machado-Alba, Jorge Enrique http://orcid.org/0000-0002-8455-0936
Article History
Received: 20 June 2019
Accepted: 21 November 2019
First Online: 3 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.