title: ASSAY FOR FRIEND LEUKEMIA VIRUS: RAPID QUANTITATIVE METHOD BASED ON ENUMERATION OF MACROSCOPIC SPLEEN FOCI IN MICE.
mesh_terms: D000818:Animals; D001681:Biological Assay; D005622:Friend murine leukemia virus; D033062:Friends; D009052:Leukemia Virus, Murine; D051379:Mice; D009858:Oncogenic Viruses; D010336:Pathology; D012106:Research; D013154:Spleen
keywords: EXPERIMENTAL LAB STUDY; MICE; MOUSE LEUKEMIA VIRUSES; ONCOGENIC VIRUSES; PATHOLOGY; SPLEEN