Beltrán, Marcelo A.
Article History
Received: 1 September 2017
Accepted: 10 May 2018
First Online: 30 May 2018
Compliance with ethical guidelines
:
: M.A. Beltrán declares that he has no competing interests.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008. Informed consent was obtained from all patients for being included in the study.