The tumor promotion potential of 2,3',4,4',5-pentachlorobiphenyl (PCB-118) was studied in a two-stage initiation/promotion bioassay in female Sprague-Dawley rats. The animals were initiated by intraperitoneal administration of N-nitrosodiethylamine after partial hepatectomy. After 5 weeks of recovery, the promotion period commenced by once-weekly… (More)
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