[Age groups, their role and methods of classification in scientific research].
D000328:Adult; D000367:Age Factors / Q000145:classification*; D000368:Aged; D000375:Aging; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D012106:Research; D012737:Sex Factors
Vozrastnye gruppy, ikh rol' i metody klassifikatsii v nauchnom issledovanii.