title: Skin cancer, photoimmunology, and urocanic acid.
mesh_terms: D000818:Animals; D006801:Humans; D007093:Imidazoles / Q000502:physiology*; D007109:Immunity / Q000528:radiation effects; D009381:Neoplasms, Radiation-Induced / Q000276:immunology*; D012878:Skin Neoplasms / Q000209:etiology / Q000276:immunology*; D014560:Urocanic Acid / Q000502:physiology*
chemical_list: D007093:Imidazoles; D014560:Urocanic Acid