PT - JOURNAL ARTICLE AU - William J Taylor AU - Hans-Georg Zmierczak AU - Philip S Helliwell TI - Problems with the definition of axial and peripheral disease patterns in psoriatic arthritis. DP - 2005 Jun 01 TA - The Journal of Rheumatology PG - 974--977 VI - 32 IP - 6 4099 - http://www.jrheum.org/content/32/6/974.short 4100 - http://www.jrheum.org/content/32/6/974.full SO - J Rheumatol2005 Jun 01; 32