Funding for this research was provided by:
National Institute of Arthritis and Musculoskeletal and Skin Diseases (T32-AR007304, P60 AR-053308, P60 AR-053308)
School of Medicine, University of California, San Francisco (NCATS UCSF-CTSI UL1-TR001872)
Hellman Fellows Fund
Received: 17 January 2018
Accepted: 27 March 2018
First Online: 23 April 2018
Ethics approval and consent to participate
: The study complied with the Helsinki Declaration and was approved by the University of California San Francisco Institutional Review Board (IRB) (Study number 11–05717). Written, informed consent was provided by the patients who chose to participate in the LOS study.
: Not applicable.
: The authors declare that they have no competing interests in this section.
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