1 Medicine Service and Research Service, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA.
2 Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA.
3 Vanderbilt University School of Medicine, Nashville, TN, USA.
4 Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, USA.
5 Division of Rheumatology and Immunology, Department of Medicine, Vanderbilt University Medical Center, and Tennessee Valley Healthcare System, Nashville, TN, USA.