RT Journal Article SR Electronic T1 Functional Assessment of Chronic Illness Therapy-Fatigue Scale is valid in patients with psoriatic arthritis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 936 OP 939 DO 10.1136/ard.2006.065763 VO 66 IS 7 A1 Chandran, Vinod A1 Bhella, Sita A1 Schentag, Catherine A1 Gladman, Dafna D YR 2007 UL http://ard.bmj.com/content/66/7/936.abstract AB