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In vitro proliferation of E. coli RDEC-1 in the absence (○) or presence (•) of 10 μM EGF added to the medium. Similar results were obtained when 0.1, 1, or 100 μM EGF was added to the preparations (data not shown). Values are means ± SEM from three experiments measured in duplicate for each group. No significant difference was observed between values of each group at any time.
