Funding for this research was provided by:
Dirección de Investigación, Universidad Nacional de Colombia (National Call for Projects to Strengthen Research, Creation and Innovation of the National University of Colombia 2016-2018 [HERMES code: 35435], [QUIPU code: 202010026772].)
Received: 4 March 2020
Accepted: 20 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Review Boards of the National University of Colombia and Instituto Nacional de Cancerología. Written informed consent was not required. The procedures followed were in accordance with the ethical standards set by the institutional ethics committee and that of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.