Received: 24 May 2019
Accepted: 26 September 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: We declare that this study was approved by the appropriate ethics committee and was therefore conducted in accordance with the ethical standards set forth in the 1964 Declaration of Helsinki and its subsequent amendments. All patients gave their informed consent prior to their inclusion in the study. Details that may reveal the identity of the subjects under study have been omitted.
: All authors are aware of the full content of the manuscript and provided consent for the submission to Advances in Rheumatology.
: The authors declare that they have no competing interests.