1. Durham Veterans Affairs Medical Center, Durham, North Carolina, USA (current affiliation);
2. Harry S Truman Memorial Veterans’ Hospital, Columbia, Missouri, USA;
3. Minneapolis Veterans Affairs Health Care System, Minneapolis, Minnesota, USA;
4. Department of Dermatology, University of Minnesota, Minneapolis, Minnesota, USA;
5. Department of Dermatology, University of Missouri Columbia, Missouri, USA;
6. Cooperative Studies Program Coordinating Center, Edward Hines Jr Veterans Affairs Hospital, Hines, Illinois;
7. Durham Veterans Affairs Medical Center, Division of General Internal Medicine, Duke University Medical Center, Durham, North Carolina, USA;
8. Saint Cloud Veterans Affairs Healthcare System, Saint Cloud, Minnesota, USA