Ferriby LL, Franke K, Unice KM, Scott P, Haws LC, Harris M, Paustenbach DJ. 2006. Serum reference levels of PCDD/Fs and dioxin-like PCBs stratified by race/ethnicity, gender and age for the general U.S. population. American Public Health Association Annual Meeting and Exposition. November 4-8, 2006. Boston, MA.