title: Age-at-enrollment versus age-at-onset of a chronic disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001294:Attitude to Health; D002908:Chronic Disease / Q000628:therapy*; D002986:Clinical Trials as Topic; D006801:Humans; D008875:Middle Aged; D011565:Psoriasis / Q000628:therapy