title: Blindness in Friesian cows in Iran.
mesh_terms: D000818:Animals; D001766:Blindness / Q000628:therapy / Q000662:veterinary*; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006501:Hepatic Encephalopathy / Q000662:veterinary; D007492:Iran; D007855:Lead Poisoning / Q000662:veterinary; D009349:Nematode Infections / Q000662:veterinary; D009584:Nitrogen / Q000506:poisoning; D010787:Photosensitivity Disorders / Q000662:veterinary; D012643:Selenium / Q000506:poisoning
chemical_list: D012643:Selenium; D009584:Nitrogen