Effectiveness and Safety of Upadacitinib in Treating Oligoarticular and Polyarticular Psoriatic Arthritis: Primary Analysis from the UPJOINT-Study. - Werner, Stephanie Gabriele; Schwarze, Ilka; Baraliakos, Xenofon; Fiene, Michael; Walter, Jochen; Girard, Tanya; Laliberté, Marie-Claude; Jeromin, Katharina; Baschuk, Nikola; Allard-Charmard, Hugues; Bessette, Louis; Hueber, Axel J. (Rheumatology & Therapy, 2026)