The need for clarity on the use of glucocorticoids for people with psoriatic arthritis: a call for consensus by Tillett, W, Coates, LC, Smith, C

The State of the Art - Psoriatic Arthritis outcome assessment in clinical trials and daily practice by Day, J, Antony, A, Tillett, W, Coates, LC

Ethical issues in a TwiCs study in early PsA by Coates, L, Tillett, W, Torgerson, D, McHugh, N, Taylor, P

Value of RAPID3 in patients with PsA: results from the TICOPA and LOPAS II databases by Coates, L, Tillett, W, Shaddick, G, Pincus, T, Kavanaugh, A, Helliwell, P

The benefits and challenges of setting up a longitudinal psoriatic arthritis database by Gladman, DD, Coates, LC, Jadon, DR, Tillett, W, Mease, PJ, Vis, M

Is risk of Kaposi's sarcoma in AIDS patients in Britain increased if sexual partners came from United States or Africa? by Beral, V, Bull, D, Jaffe, H, Evans, B, Gill, N, Tillett, H, Swerdlow, A

Usage of C-reactive protein testing in the diagnosis and monitoring of psoriatic arthritis (PsA): results from a real-world survey in the USA and Europe by Ogdie, A, Tillett, W, Booth, N, Howell, O, Schubert, A, Peterson, S, Chakravarty, SD, Coates, LC

Performance and predictors of minimal disease activity response in peripheral spondyloarthritis patients treated with adalimumab by Coates, LC, Abraham, S, Tillett, W, Mease, PJ, Ramiro, S, Wu, T, Wang, X, Pangan, AL, Song, I-H

Classification and outcome measures for psoriatic arthritis by Leung, Y, Ogdie, A, Orbai, A, Tillett, W, Coates, L, Strand, V, Mease, P, Gladman, D

GRAPPA-OMERACT initiative to standardise outcomes in psoriatic arthritis clinical trials and longitudinal observational studies by Tillett, W, Orbai, A, Ogdie, A, Leung, Y, Strand, V, Gladman, D, Mease, P, Coates, L

Evaluation and validation of a patient completed psoriatic arthritis flare questionnaire by Helliwell, PS, Tillett, W, Waxman, R, Coates, LC, Brooke, M, FitzGerald, O, Packham, JC, McHugh, N

Clinical effectiveness of symptomatic therapy compared to standard step up care for the treatment of low impact psoriatic oligoarthritis: the 2-arm parallel group randomised POISE... by Rombach, I, Tucker, L, Tillett, W, Jadon, D, Watson, M, Francis, A, Sinomati, Y, Dutton, SJ, Coates, L

Upadacitinib response rates in patients with psoriatic arthritis enrolled in the SELECT-PsA-1 and SELECT-PsA-2 trials assessed according to modified PsARC by Coates, LC, Garrood, T, Gullick, N, Helliwell, P, Kent, T, Marks, J, Tillett, W, Kaur-Papadakis, D, Tahir, H, van Haaren, S, McInnes, I

Psoriatic arthritis by FitzGerald, O, Ogdie, A, Chandran, V, Coates, LC, Kavanaugh, A, Tillett, W, Leung, YY, deWit, M, Scher, JU, Mease, PJ

Effect of filgotinib on health-related quality of life in active psoriatic arthritis: a randomized phase 2 trial (EQUATOR) by Orbai, A-M, Ogdie, A, Gossec, L, Tillett, W, Leung, YY, Gao, J, Trivedi, M, Tasset, C, Meuleners, L, Besuyen, R, Hendrikx, T, Coates, LC

Comparison between adalimumab introduction and methotrexate dose escalation in patients with inadequately controlled psoriatic arthritis (CONTROL): a randomised, open-label, two-pa... by Coates, LC, Tillett, W, D’Agostino, MA, Rahman, P, Behrens, F, McDearmon-Blondell, EL, Bu, X, Chen, L, Kapoor, M, Conaghan, PG, Mease, P

Appraisal of candidate instruments for assessment of the physical function domain in patients with psoriatic arthritis by Leung, YY, Orbai, A-M, Ogdie, A, Hojgaard, P, Holland, R, Goel, N, Chau, J, Coates, LC, Strand, V, Gladman, DD, Mease, P, Christensen, R, Tillett, W

The GRAPPA-OMERACT Psoriatic Arthritis Working Group at the 2018 annual meeting: report and plan for completing the core outcome measurement set by Leung, Y, Orbai, A, Ogdie, A, Coates, L, De Wit, M, Callis Duffin, K, Eder, L, Gladman, D, Goel, N, Mease, P, Strand, V, Fitzgerald, O, Tillett, W

Outcomes of the 2019 GRAPPA workshop on continuous composite indices for the assessment of psoriatic arthritis and membership: Recommended next steps by Tillett, W, McHugh, N, Orbai, AM, Ogdie, A, Leung, YY, Coates, LC, Mease, P, Gladman, DD, Brooke, M, Packham, J, O’Sullivan, D, FitzGerald, O, Helliwell, PS

Test-retest reliability for HAQ-DI and SF-36 PF for the measurement of physical function in psoriatic arthritis by Leung, YY, Tillett, W, Hojgaard, P, Orbai, A-M, Holland, R, Mathew, AJ, Goel, N, Chau, J, Lindsay, C, Ogdie, A, Coates, LC, Christensen, R, Mease, P, Strand, V, Gladman, DD