[Methodologic approaches to selecting groups of high-risk children].
D002648:Child; D002675:Child, Preschool; D006305:Health Status Indicators; D006306:Health Surveys; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D012306:Risk; D014505:Urban Population
Metodicheskie podkhody k otboru gruppy deteĭ povyshennogo riska.