Funding for this research was provided by:
National Secretary of Higher Education, Science, Technology and Innovation
Received: 24 March 2019
Accepted: 23 May 2019
First Online: 10 June 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of “Hermanos Ameijeiras” Clinical and Surgical Hospital. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declared no potential competing interests.