Shishkin, A. ., Nikolaeva , A. ., & Smirnova, I. (2020). Psoriatic arthritis: current state of the problemPsoriatic arthritis: Current state of the problem. Вестник Санкт-Петербургского университета. Медицина, 14(3), 194–203. https://doi.org/10.21638/spbu11.2019.302