Text and Data Mining valid from 2019-01-06
Received: 18 September 2018
Accepted: 5 December 2018
First Online: 6 January 2019
Compliance with Ethical Standards
: Author Márcio Lima declares that he has no conflict of interest. Author Rommel Barbosa declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by either of the authors.
: Not applicable.