1. University of Missouri- Kansas City School of Medicine, Kansas City, Missouri
2. National Institutes of Health Library, Office of Research Services, National Institutes of Health, Bethesda, Maryland
3. Department of Dermatology, Temple University, Philadelphia, Pennsylvania
4. Dermatology Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland