Value of ultrasonography as a marker of early response to abatacept in patients with rheumatoid arthritis and an inadequate response to methotrexate: results from the APPRAISE study

Maria-Antonietta D'Agostino, Richard J Wakefield, Hilde Berner-Hammer, Olivier Vittecoq, Georgios Filippou, Peter Balint, Ingrid Möller, Annamaria Iagnocco, Esperanza Naredo, Mikkel Østergaard, Maarten Boers, Corine Gaillez, Karina Van Holder, Manuela Le Bars, OMERACT-EULAR-Ultrasound Task Force