2002i-795 business childnutritionalphysiologicalphenomena children datacollection economics eligibilitydetermination evaluation foodassistance foodrelief general infantnutritionalphysiologicalphenomena infants infantwelfare infrastructure maternalwelfare mothers nutrition nutritionalaspects nutritionalphysiologicalphenomena pregnancy riskassessment socialscience statisticalmethods unitedstates wa310aa1 ws115d56552002