For citations:

Volnukhin E.V., Galushko E.A., Bochkova A.G., Smirnov A.V., Erdes Sh.F. Clinical diversity of ankylosing spondylitis in the real practice of a rheumatologist in Russia (Part 1). Rheumatology Science and Practice. 2012;50(2):44-49. (In Russ.) https://doi.org/10.14412/1995-4484-2012-1272