Funding for this research was provided by:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (88881.119924/2016-01)
Fundação de Amparo à Pesquisa do Estado de Minas Gerais (APQ-00756-16)
Received: 30 October 2017
Accepted: 6 January 2018
First Online: 17 January 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest and no competing financial interest.