On the natural history of some common diseases.
D000293:Adolescent; D000328:Adult; D000342:Affective Symptoms / Q000453:epidemiology; D000367:Age Factors; D001416:Back Pain / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004739:England; D005194:Family Practice; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology; D008875:Middle Aged; D012141:Respiratory Tract Infections / Q000453:epidemiology; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology; D012737:Sex Factors