Funding for this research was provided by:
Rheumatology Research Foundation (Disease Targeted Research Pilot Grant)
Received: 1 October 2019
Revised: 21 December 2019
Accepted: 29 December 2019
First Online: 30 January 2020
Compliance with ethical standards
: All study procedures were approved by the UAB Institutional Review Board and have, therefore, been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All participants gave written informed consent prior to inclusion in the study. Details that might disclose the identity of the subjects under study have been omitted.