Funding for this research was provided by:
Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (16/2551-0000359-9)
Text and Data Mining valid from 2019-02-28
Received: 11 September 2018
Revised: 13 February 2019
Accepted: 19 February 2019
First Online: 28 February 2019
Compliance with ethical standards
: The authors declare no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.