title: [Ultrastructural observations on the basement membrane of patients with oral leukoplakia].
mesh_terms: D000328:Adult; D000368:Aged; D001485:Basement Membrane / Q000648:ultrastructure; D005260:Female; D006801:Humans; D007972:Leukoplakia, Oral / Q000473:pathology*; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009061:Mouth Mucosa / Q000648:ultrastructure*