1991 2001-2021 2003-2011 2010k-646 adverseeffects afghancampaign2001- afghanistan afghanwar air airmicrobiology airpollutants dustcontrol engineering environmental environmentalaspects environmentalexposure environmentalpollution epidemiology healthaspects iraqwar microbiology particles persiangulfsyndrome persiangulfwar pollution pollutioncontrol programevaluation research technology toxicity unitedstates urbanhealth wa754