RT Journal Article SR Electronic T1 Influence of HLA-B27 on the clinical presentation of psoriatic arthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2511 OP 2511 VO 30 IS 11 A1 Nicola Dalbeth A1 Joanne L Dockerty A1 Lyn Williamson YR 2003 UL http://www.jrheum.org/content/30/11/2511.abstract AB