Junctional and High-Level Dendritic Cells Revealed with Osmium Iodide Reaction in Human and Animal Epidermis Under Conditions of Hyperpigmentation and Depigmentation11From the Departments of Dermatology, Wayne State University College of Medicine and Detroit Receiving Hospital (Hermann Pinkus, M.D., Chairman), Detroit, Michigan.Supported in part by research grant RG-4435 and C-2072 from the National Institutes of Health, U. S. Public Health Service, and in part by research contract DA-49-007-MD-584 from the Research and Development Division, Office of the Surgeon General, Department of the Army.