TY - JOUR T1 - Response to: ‘The GRAPPA-OMERACT initiative to standardise outcomes in Psoriatic Arthritis clinical trials and longitudinal observational studies’ by Tillet <em>et al</em> JF - Annals of the Rheumatic Diseases JO - Ann Rheum Dis SP - e24 LP - e24 DO - 10.1136/annrheumdis-2017-212012 VL - 77 IS - 5 AU - Sofia Ramiro AU - Josef S Smolen AU - Robert B M Landewé AU - Désirée van der Heijde AU - Laure Gossec Y1 - 2018/05/01 UR - http://ard.bmj.com/content/77/5/e24.abstract N2 - We thank Tillet et al for their comments1 on our letter to the editor entitled ‘How are enthesitis, dactylitis and nail involvement measured and reported in recent clinical trials of psoriatic arthritis? A systematic literature review’.2 We appreciate that the authors are in agreement with our view regarding the clear need for the … ER -