Funding for this research was provided by:
Text and Data Mining valid from 2017-03-07
Received: 6 October 2016
Accepted: 21 February 2017
First Online: 7 March 2017
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: The authors state that the procedures followed were according to the research ethics committee regulations. The protocols of our institution were followed to access participants data and such information was analyzed with the sole purpose of carrying out and disseminate scientific research findings.
: All of the participants were informed of the purposes of the research and all of them signed the informed consent form.