Symptom prevalence and severity in a general practice population.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004812:Epidemiologic Methods; D005194:Family Practice; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D012606:Scotland; D012649:Self Concept; D013997:Time Factors