For citations:

Sakharova KV, Podryadnova MV, Erdes SF. The effectiveness of switching from an originator biological agent to its biosimilar, or vice versa, for ankylosing spondylitis in real clinical practice. Sovremennaya Revmatologiya=Modern Rheumatology Journal. 2020;14(4):157-160. (In Russ.) https://doi.org/10.14412/1996-7012-2020-4-157-160