Funding for this research was provided by:
National Institute of Arthritis and Musculoskeletal and Skin Diseases (3R01AR059673 - 03W1, P60 AR062760)
Received: 4 January 2018
Accepted: 26 April 2018
First Online: 4 July 2018
Ethics approval and consent to participate
: All procedures were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all participants included in the study. The study was reviewed and approved by the Duke University Institutional Review Board # Pro00022836.
: The authors declare that they have no competing interests.
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