title: The skin, a primary lymphoid organ?
mesh_terms: D000818:Animals; D004817:Epidermis / Q000502:physiology; D006801:Humans; D007633:Keratins; D007801:Langerhans Cells / Q000502:physiology; D008221:Lymphoid Tissue / Q000502:physiology*; D012867:Skin / Q000276:immunology*
chemical_list: D007633:Keratins