Funding for this research was provided by:
Fundación para Promoción de la Investigación y la Tecnología, Banco de la República de Colombia (Proyecto 3637)
Article History
Received: 6 March 2018
Accepted: 16 February 2019
First Online: 25 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.