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Opoka-Winiarska, Violetta, Zbigniew Żuber, Ekaterina Alexeeva, Vyacheslav Chasnyk, Irina Nikishina, Grażyna Dębowska, and Elżbieta Smolewska. "Long-term, Interventional, Open-label Extension Study Evaluating the Safety of Tocilizumab Treatment in Patients With Polyarticular-course Juvenile Idiopathic Arthritis From Poland and Russia Who Completed the Global, International CHERISH Trial." Clin Rheumatol 2018.

Opoka-Winiarska, Violetta, et al. "Long-term, Interventional, Open-label Extension Study Evaluating the Safety of Tocilizumab Treatment in Patients With Polyarticular-course Juvenile Idiopathic Arthritis From Poland and Russia Who Completed the Global, International CHERISH Trial." Clin Rheumatol 2018.