From the *Division of Rheumatology and †Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD.
Dr. Mizelle was supported by NIH Grant T32 AR048522.
The authors declare no conflict of interest.
Correspondence: Allan C. Gelber, MD, Johns Hopkins University School of Medicine, 5200 Eastern Ave, Mason F. Lord Bldg, Center Tower, Suite 4100, Baltimore, MD 21224. E-mail: firstname.lastname@example.org.