4F iedler H, Hutzinger O. Sources and sinks of dioxins [J]. Chemo sphere, 1992, 25 (7210): 148721491.
5Suzuki G, Nakano M, Nakano S. Distribution of PCDDs/PCDFs and Co-PCBs in human maternal blood, cord blood, plaeenta, milk, and adiposetissue: dioxins showing high toxic equivalency factor accumulate in the placenta [ J J. Biosci Biotechnol Biochem, 2005, 69: 1836-1847.