Funding for this research was provided by:
Fundação de Amparo à Pesquisa do Estado de Minas Gerais (APQ-04112-17)
Text and Data Mining valid from 2019-06-25
Received: 1 February 2019
Accepted: 31 May 2019
First Online: 25 June 2019
Ethics approval and consent to participate
: This study is based on a public database that does not have individual identification. It was approved by the local Research and Ethics Committee from the Federal University of Minas Gerais (CAEE no. 76981917.4.0000.5149).
: Not applicable.
: The authors declare that they have no competing interests.