"D. Drew et al., Chlorpyrifos: Revised Human Health Risk Assessment for Registration Review, December 29, 2014, D424485;
U.S. Environmental Protection Agency, Literature Review on Neurodevelopment Effects & FQPA Safety Factor Determination for the Organophosphate Pesticides, September 15, 2015, D331251;
R. Bohaty and J. Hetrick. Chlorpyrifos Registration Review Drinking Water Assessment, April 14, 2016, D432921
U.S. Environmental Protection Agency, Chlorpyrifos Issue Paper: Evaluation of Biomonitoring Data from Epidemiology Studies, March 11, 2016 and supporting analyses presented to the FIFRA Scientific Advisory Panel’s (SAP) meeting on April 1921, 2016, (EPA-HQ-OPP-2016-0062). "
And that's not the only study they referenced:
https://www.regulations.gov/document?D=EPA-HQ-OPP-2015-0653-...
"D. Drew et al., Chlorpyrifos: Revised Human Health Risk Assessment for Registration Review, December 29, 2014, D424485;
U.S. Environmental Protection Agency, Literature Review on Neurodevelopment Effects & FQPA Safety Factor Determination for the Organophosphate Pesticides, September 15, 2015, D331251;
R. Bohaty and J. Hetrick. Chlorpyrifos Registration Review Drinking Water Assessment, April 14, 2016, D432921
U.S. Environmental Protection Agency, Chlorpyrifos Issue Paper: Evaluation of Biomonitoring Data from Epidemiology Studies, March 11, 2016 and supporting analyses presented to the FIFRA Scientific Advisory Panel’s (SAP) meeting on April 1921, 2016, (EPA-HQ-OPP-2016-0062). "