[1] Univ Minnesota, Med Sch, Minneapolis, MN USA
[2] Univ Minnesota, Hormel Inst, 801 16th Ave NE, Austin, MN 55912 USA
[3] Univ Minnesota, Biostat Core, Mason Canc Ctr, Minneapolis, MN USA
[4] Univ Minnesota, Dept Dermatol, Minneapolis, MN 55455 USA
[5] Univ Minnesota, Dept Med, Box 736 UMHC, Minneapolis, MN 55455 USA
[6] Minneapolis VA Med Ctr, Dept Med, Minneapolis, MN 55417 USA
[7] Minneapolis VA Med Ctr, Dept Dermatol, Minneapolis, MN 55417 USA