For citations:

Erdes Sh.F., Bochkova A.G., Dubinina T.V., Rumyantseva O.A., Smirnov A.V. Early diagnosis of ankylosing spondylitis. Rheumatology Science and Practice. 2013;51(4):365-367. (In Russ.) https://doi.org/10.14412/1995-4484-2013-1245