For citations:
Rumyantseva D.G., Podryadnova M.V., Rumyantseva O.A., Urumova M.M., Erdes Sh. THE SEVERE COURSE OF DRUG THERAPY-RESISTANT ANKYLOSING SPONDYLITIS. Rheumatology Science and Practice. 2020;58(2):232-237. (In Russ.) https://doi.org/10.14412/1995-4484-2020-233-237