Silva Filho, José Maria Clemente da http://orcid.org/0000-0003-4110-0609
Ermakov, Viktor A. http://orcid.org/0000-0003-1125-4447
Marques, Francisco Chagas
Article History
Received: 24 July 2017
Accepted: 5 January 2018
First Online: 24 January 2018
Competing Interests
: The authors declare that they have no competing interests.