I am looking for up to date reference values / citations for PCB levels in human subjects, specifically PCB congeners (e.g. 101, 118, 153, 138, 180, 170) and Aroclor (1242, 1248, 1254, 1260.) Whole blood and serum / plasma data is of most interest. Any help greatly appreciated. Please e-mail at scottr at nbnet.nb.ca. TIA.