The committee reviewed all relevant literature published between October 2010 and September 2011 and integrated the new findings with the previously assembled epidemiological data on each health outcome assessed with respect to exposure to the chemicals constituting the herbicides used in Vietnam, including the dioxin contaminant 2,3,7,8-TCDD. The single new conclusion was that there is limited or suggestive evidence of a scientifically meaningful association of stroke with exposure to the chemicals in question.