Sentinel surveillance in general practice--annual report for 1998.
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003141:Communicable Diseases / Q000453:epidemiology*; D004739:England / Q000453:epidemiology; D005194:Family Practice / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012017:Referral and Consultation / Q000706:statistics & numerical data; D018571:Sentinel Surveillance; D017678:Sex Distribution; D014852:Wales / Q000453:epidemiology