[Effect of the methodologic approach in the gathering of data for determining morbidity in young children].
D000367:Age Factors; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008722:Methods; D009017:Morbidity
Vliianie metodicheskikh priemov sbora materiala na opredelenie urovnia zabolevaemosti deteĭ rannego vozrasta.