1. University of Southern California Keck School of Medicine; Los Angeles CA U.S.A.
2. The Warren Alpert Medical School; Brown University; Providence RI U.S.A.
3. Department of Medicine; University of Arizona; Tucson AZ U.S.A.
4. Department of Dermatology; University of California; Davis, Sacramento CA U.S.A.
5. Division of Dermatology; Department of Medicine; University of Arizona; Tucson AZ U.S.A.