Moraliyska, Rosina Todorova, Simona Bogdanova, Svetoslav Dimitrov, Georgi Gerganov, Svetlana Hristova, Tsvetoslav Georgiev, and Tanya Shivacheva. “Effectiveness and Safety of Upadacitinib – Data from Real Clinical Practice in Bulgaria”. Rheumatology (Bulgaria) 31, no. 1 (May 25, 2023): 3–16. Accessed October 12, 2026. https://rheumatologybg.org/journal/rbj/article/view/82.