Long-Term Efficacy and Safety of Upadacitinib in Patients with Rheumatoid Arthritis: Final Results from the BALANCE-EXTEND Open-Label Extension Study oleh Alan Kivitz, Alvin F. Wells, Juan I. Vargas, Herbert S. B. Baraf, Maureen Rischmueller, Justin Klaff, Nasser Khan, Yihan Li, Kyle Carter, Alan Friedman, Patrick Durez