[An investigation of psoriasis in Chengdu and Deyang].
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D002681:China; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D011565:Psoriasis / Q000453:epidemiology* / Q000235:genetics; D012424:Rural Population