title: Lack of relationship between infection with avian leukosis virus and the presence of COFAL antigen in chick embryos.
mesh_terms: D000818:Animals; D000941:Antigens; D001354:Avian Leukosis Virus / Q000276:immunology*; D001358:Avian Sarcoma Viruses; D001921:Brain; D002642:Chick Embryo; D003168:Complement Fixation Tests; D006224:Cricetinae; D005321:Extraembryonic Membranes; D066298:In Vitro Techniques; D007422:Intestines; D007668:Kidney; D008099:Liver; D008168:Lung; D008854:Microscopy, Electron
chemical_list: D000941:Antigens