Funding for this research was provided by:
Cooperativa de Ensino Superior Politécnico e Universitário (CICS-UnIPSa)
Text and Data Mining valid from 2018-03-03
Received: 20 June 2017
Accepted: 20 February 2018
First Online: 3 March 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed involving human participants were in accordance with the ethical standards of the institutional and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.