Funding for this research was provided by:
Patient-Centered Outcomes Research Institute (CER-1306-02043)
National Institute on Aging (T35-AG038047-08)
National Institute of Arthritis and Musculoskeletal and Skin Diseases (P60 AR062760)
U.S. Department of Veterans Affairs (CIN 13-410)
Received: 19 January 2018
Accepted: 18 June 2018
First Online: 19 July 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Boards of the University of North Carolna at Chapel Hill and Duke University Medical Center. All study participants provided written informed consent.
: Not applicable.
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