Health service utilization in Central Virginia: a comparison of estimated and observed rates.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003153:Community Health Services / Q000706:statistics & numerical data*; D004522:Educational Status; D005006:Ethnicity; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012424:Rural Population; D012494:Sampling Studies; D012737:Sex Factors; D014481:United States; D014492:United States Public Health Service; D014505:Urban Population; D014600:Utilization Review; D014768:Virginia