title: Aging of chick embryo fibroblasts in vitro--VI. Different aging patterns of population doubling rate and polyploidization.
mesh_terms: D000818:Animals; D002455:Cell Division; D002467:Cell Nucleus / Q000648:ultrastructure; D002470:Cell Survival; D002478:Cells, Cultured; D002642:Chick Embryo; D005347:Fibroblasts / Q000648:ultrastructure*; D011123:Polyploidy