Am J Physiol Gastrointest Liver Physiol. 2017 Sep 1;313(3):G166-G179. doi: 10.1152/ajpgi.00079.2017. Epub 2017 May 19.
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Changes of colon epithelium proliferation due to individual aging with cyclin proliferating cell nuclear antigen (PCNA/cyclin) immunostaining compared to [3H]-thymidine radioautography.