Email Post: Updating “Dataset of transcriptomic changes that occur in human preadipocytes over a 3-day course of exposure to 3,3′,4,4′,5-Pentachlorobiphenyl (PCB126)” with additional data on exposure to 2,2′,5,5′-tetrachlorobiphenyl (PCB52) or its 4-hydroxy metabolite (4-OH-PCB52)