title: Penetrating keratoplasty with purified bovine collagen: report of a coordinated trial on fifteen human cases.
mesh_terms: D000818:Animals; D000937:Antigen-Antibody Reactions; D003094:Collagen / Q000627:therapeutic use*; D003315:Cornea / Q000276:immunology; D003318:Corneal Opacity / Q000209:etiology / Q000601:surgery; D016039:Corneal Transplantation; D003320:Corneal Ulcer / Q000150:complications; D005260:Female; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D014183:Transplantation, Heterologous; D014786:Vision Disorders / Q000150:complications
chemical_list: D003094:Collagen