 growth human cell line newborn rat inject intraven newborn rat human tissu-cultur cancer cell line -dash ep 2 detroit 6 j-111 rp 41 rp 212 adeno cx 1 ovari 2 mac 21 -dash grew progress lung organ 50 cent anim commonli caus death 5-8 week human cell line -dash carcinoma ep 1 presum normal amnion -dash grew frequent rare caus death ill 