Received: 6 February 2019
Accepted: 26 September 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: The research protocol was approved by the Institutional Review Boards of both institutions involved in the study: Comitê de Ética em Pesquisa da UNIFESP-EPM and by the Comitê de Ética em Pesquisa from HC-UFPR. This study complied with the Declaration of Helsinki and all participants gave written informed consent.
: All authors are aware of the content of this article and provided consent for publication in Advances in Rheumatology.
: The authors declare that they have no competing interests.