Familial occurrence of psoriatic arthritis.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001168:Arthritis / Q000453:epidemiology / Q000235:genetics*; D001172:Arthritis, Rheumatoid / Q000453:epidemiology / Q000235:genetics; D004739:England; D005260:Female; D006073:Gout / Q000453:epidemiology / Q000235:genetics; D006801:Humans; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000453:epidemiology / Q000235:genetics; D011565:Psoriasis / Q000453:epidemiology / Q000235:genetics*; D013166:Spondylitis / Q000453:epidemiology / Q000235:genetics