Spontaneous transformation of in vitro normal cells (author's transl).
D000818:Animals; D002455:Cell Division; D002471:Cell Transformation, Neoplastic; D002478:Cells, Cultured; D008722:Methods; D051379:Mice; D008807:Mice, Inbred BALB C; D009374:Neoplasms, Experimental / Q000209:etiology*