RT Journal Article SR Electronic T1 Do Biologic-treated Psoriatic Arthritis Patients with Spondylitis Respond Differently with or without Concomitant Methotrexate from Patients without Spondylitis? JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 471 OP 473 DO 10.3899/jrheum.160046 VO 43 IS 3 A1 PHILIP J. MEASE YR 2016 UL http://www.jrheum.org/content/43/3/471.abstract AB