Funding for this research was provided by:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (001)
Received: 13 June 2019
Accepted: 28 September 2019
First Online: 9 October 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
Free to read: This content has been made available to all.