[1] Univ Missouri, Harry S Truman Mem Vet Hosp, Columbia, MO 65211 USA
[2] Univ Missouri, Dept Dermatol, Columbia, MO 65211 USA
[3] Univ Minnesota, Minneapolis Vet Affairs Hlth Care Syst, Minneapolis, MN USA
[4] Univ Minnesota, Dept Dermatol, Minneapolis, MN USA
[5] Hines Vet Affairs Hosp, Cooperat Studies Program Coordinating Ctr, Hines, IL USA
[6] Duke Univ, Med Ctr, Div Gen Internal Med, Durham Vet Affairs Med Ctr, Durham, NC 27710 USA
[7] Univ Calif San Francisco, Dept Dermatol, San Francisco Vet Affairs Medi Ctr, San Francisco, CA 94143 USA
[8] St Cloud Vet Affairs Hlth Care Syst, St Cloud, MN USA
[9] Durham VA Med Ctr, Durham, NC 27705 USA