[Analysis of the contigents of those who are ill for a long time and frequently].
D000041:Absenteeism; D000293:Adolescent; D000328:Adult; D002908:Chronic Disease; D005260:Female; D006801:Humans; D009784:Occupational Diseases / Q000453:epidemiology*; D002094:Republic of Belarus
K analizu kontigentov dlitel'no i chasto boleiushchikh.