title: Immunohistochemical study of types I, III and IV collagen in fibrosis of diseased gingiva during chronic periodontitis: a light and electron microscopic study.
mesh_terms: D002908:Chronic Disease; D003094:Collagen / Q000032:analysis* / Q000145:classification; D003238:Connective Tissue / Q000473:pathology; D005355:Fibrosis; D005881:Gingiva / Q000032:analysis* / Q000473:pathology; D006651:Histocytochemistry; D006801:Humans; D007158:Immunologic Techniques; D008854:Microscopy, Electron; D008875:Middle Aged; D010518:Periodontitis / Q000378:metabolism* / Q000473:pathology
chemical_list: D003094:Collagen