Text and Data Mining valid from 2019-02-08
Received: 6 November 2018
Revised: 3 January 2019
Accepted: 26 January 2019
First Online: 8 February 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The authors declare that the protocol of the research work was approved by the Ethics Commission of the Universidade Federal do Rio de Janeiro (UFRJ) according to the Helsinki Declaration, and all the patients provided written informed consent.