title: Euthanasia by hypoxia using nitrogen. A review after four years of operation involving 20 500 animals.
mesh_terms: D000818:Animals; D002415:Cats; D004285:Dogs; D005065:Euthanasia; D000860:Hypoxia / Q000662:veterinary*; D009584:Nitrogen / Q000008:administration & dosage*
chemical_list: D009584:Nitrogen