Text and Data Mining valid from 2019-08-14
Received: 27 May 2019
Revised: 23 July 2019
Accepted: 7 August 2019
First Online: 14 August 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The protocol was approved by the Institutional Research Ethics Committees of University of Londrina, Paraná, Brazil (CAAE: 22290913.9.0000.5231) and all the individuals invited were informed in detail about the research and gave written Informed Consent.