title: Cellular differentiation of the middle ear lining.
mesh_terms: D001706:Biopsy; D002454:Cell Differentiation; D004432:Ear, Middle / Q000473:pathology*; D004848:Epithelium / Q000473:pathology; D006801:Humans; D007223:Infant; D007633:Keratins; D009092:Mucous Membrane / Q000473:pathology*; D010033:Otitis Media / Q000473:pathology*
chemical_list: D007633:Keratins