title: Results obtained in perforating keratoplasty with corneas preserved in liquid nitrogen.
mesh_terms: D002470:Cell Survival; D003315:Cornea / Q000166:cytology; D016039:Corneal Transplantation; D004727:Endothelium / Q000166:cytology; D005260:Female; D005615:Freezing; D006801:Humans; D008297:Male; D009584:Nitrogen; D009926:Organ Preservation; D012034:Refrigeration; D013997:Time Factors
chemical_list: D009584:Nitrogen