Text and Data Mining valid from 2019-01-18
Received: 7 October 2018
Accepted: 8 January 2019
First Online: 18 January 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee “Comitê de Ética em Pesquisa (COEP) da Universidade Federal de Minas Gerais”
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.