Text and Data Mining valid from 2019-11-29
Received: 2 July 2019
Accepted: 12 November 2019
First Online: 29 November 2019
Conflict of interest
: E. Ferrari de Brito, E.L. Lopes Baldin, G.L. Padoan Gonçalves, L. Gimenes, J. Batista Fernandes and L. do Prado Ribeiro declare that they have no competing interests.