tween exposed and unexposed veterans could influence the rates of health outcomes. This information is also lacking for the Gulf War veteran population. Indeed most of the evidence that the committee used to form its conclusions about the association of the putative agents and health effects comes from studies of populations exposed to these agents in occupational and clinical settings, rather than from studies of Gulf War veterans. Due to the lack of exposure data on veterans, the committee could not extrapolate from the level of exposure in the studies that it reviewed to the level of exposure in Gulf War veterans. Thus, the committee could not determine the likelihood of increased risk of adverse health outcomes among Gulf War veterans due to exposure to the agents examined in this report.

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