Epidemiological aspects of psoriasis and arthritis.
D000293:Adolescent; D000328:Adult; D001172:Arthritis, Rheumatoid / Q000150:complications*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D011565:Psoriasis / Q000150:complications* / Q000453:epidemiology*