allergyannalesbrainchildchildhoodchildrencomplementarydevelopmentdietsearlyeatingenvironmentalfeedingfoodfuturegrowthguthealthhealthyhumanimpactimpactsinfantslaterlongmicrobiomemicrobiotanestenestlenniwnniw101nniw102nutritionobesityoutcomespatternspretermpreventionprofroundsessionstrategiestabletermyoung