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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mrj</journal-id><journal-title-group><journal-title xml:lang="ru">Современная ревматология</journal-title><trans-title-group xml:lang="en"><trans-title>Modern Rheumatology Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1996-7012</issn><issn pub-type="epub">2310-158X</issn><publisher><publisher-name>IMA-PRESS, LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14412/1996-7012-2018-1-13-19</article-id><article-id custom-type="elpub" pub-id-type="custom">mrj-803</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL INVESTIGATIONS</subject></subj-group></article-categories><title-group><article-title>Внескелетные проявления и показатели воспалительной активности и тяжести при анкилозирующем спондилите</article-title><trans-title-group xml:lang="en"><trans-title>Extraskeletal manifestations and the indicators of inflammatory activity and severity in ankylosing spondylitis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Годзенко</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Godzenko</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>125993, Москва, ул. Баррикадная, 2/1</p><p>115522, Москва, Каширское шоссе, 34А</p></bio><bio xml:lang="en"><p>2/1, Barrikadnaya St., Moscow 125993</p><p>34A, Kashirskoe Shosse, Moscow 115522</p></bio><email xlink:type="simple">alla1106@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Румянцева</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rumyantseva</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, Каширское шоссе, 34А</p></bio><bio xml:lang="en"><p>34A, Kashirskoe Shosse, Moscow 115522</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бочкова</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Bochkova</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, Каширское шоссе, 34А</p></bio><bio xml:lang="en"><p>34A, Kashirskoe Shosse, Moscow 115522</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корсакова</surname><given-names>Ю. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Korsakova</surname><given-names>Yu. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, Каширское шоссе, 34А</p></bio><bio xml:lang="en"><p>34A, Kashirskoe Shosse, Moscow 115522</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Эрдес</surname><given-names>Ш.</given-names></name><name name-style="western" xml:lang="en"><surname>Erdes</surname><given-names>Sh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, Каширское шоссе, 34А</p></bio><bio xml:lang="en"><p>34A, Kashirskoe Shosse, Moscow 115522</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бадокин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Badokin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>125993, Москва, ул. Баррикадная, 2/1</p><p>115522, Москва, Каширское шоссе, 34А</p></bio><bio xml:lang="en"><p>2/1, Barrikadnaya St., Moscow 125993</p><p>34A, Kashirskoe Shosse, Moscow 115522</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России&#13;
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ФГБНУ «Научно-исследовательский институт ревматологии им. В.А. Насоновой»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Medical Academy of Continuing Professional Education, Ministry of Health of Russia&#13;
&#13;
V.A. Nasonova Research Institute of Rheumatology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБНУ «Научно-исследовательский институт ревматологии им. В.А. Насоновой»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>V.A. Nasonova Research Institute of Rheumatology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>02</day><month>04</month><year>2018</year></pub-date><volume>12</volume><issue>1</issue><fpage>13</fpage><lpage>19</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Годзенко А.А., Румянцева О.А., Бочкова А.Г., Корсакова Ю.О., Эрдес Ш., Бадокин В.В., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Годзенко А.А., Румянцева О.А., Бочкова А.Г., Корсакова Ю.О., Эрдес Ш., Бадокин В.В.</copyright-holder><copyright-holder xml:lang="en">Godzenko A.A., Rumyantseva O.A., Bochkova A.G., Korsakova Y.O., Erdes S., Badokin V.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://mrj.ima-press.net/mrj/article/view/803">https://mrj.ima-press.net/mrj/article/view/803</self-uri><abstract><p>Внескелетные проявления (ВП) часто наблюдаются при анкилозирующем спондилите (АС). Имеющиеся данные о связи ВП с воспалительной активностью и другими клиническими параметрами АС противоречивы.</p><p>Цель исследования – оценить ассоциацию ВП с воспалительной активностью и другими проявлениями АС.</p><sec><title>Пациенты и методы</title><p>Пациенты и методы. В Научно-исследовательском институте ревматологии им. В.А. Насоновой обследовано 452 пациента (363 мужчины и 89 женщин) с диагнозом АС,  соответствующим Нью-Йоркским критериям (1984). Медиана возраста больных составила  31,5 [24; 41] года, возраста начала болезни – 19,5 [15; 23] года и ее продолжительности –  11,5 [7; 18] года. У 442 (97,7%) пациентов выявлен HLA-В27. Помимо стандартного  клинического, лабораторного и инструментального обследования, 172 больным выполняли трансторакальную эхокардиографию, по показаниям пробу Реберга, исследование IgA, гистологическое исследование подкожной клетчатки или слизистой оболочки  двенадцатиперстной кишки на амилоид, УЗИ почек, колоноскопию, проводили консультации офтальмолога, дерматолога, нефролога, уролога, гастроэнтеролога. В качестве ВП  рассматривали увеит, поражение сердца (нарушение проводимости, изменения аорты и  клапанов), воспалительные заболевания кишечника (ВЗК), гломерулонефрит, псориаз. У  218 (48%) из 452 пациентов выявлены ВП: у 140 (30%) – увеит, у 61 (13,4%) – нарушение  сердечной проводимости, у 17 (3,7%) – псориаз, у 16 (3,5%) – ВЗК, у 16 (3,5%) – нефрит, у 71 (41,2%) из 172 – изменения аорты и клапанов сердца. Проводили сопоставление групп больных с ВП (n=218) и без ВП (n=234) по возрасту начала АС, наличию HLA-В27, артрита периферических суставов, коксита, энтезита, синдесмофитов, лихорадки, анемии,  потребности в назначении генно-инженерных биологических препаратов (ГИБП) и/или  системных глюкокортикоидов (ГК), величине индекса BASDAI (Bath Ankylosing Spondylitis Disease Activity Index) и СОЭ.</p></sec><sec><title>Результаты</title><p>Результаты. Группы с ВП и без ВП были сопоставимы по полу, возрасту, длительности АС, наличию HLA-В27. Достоверных различий по величине СОЭ, BASDAI, частоте коксита,  энтезитов, синдесмофитов в позвоночнике не выявлено. В группе с ВП достоверно чаще в  сравнении с группой без ВП наблюдались периферический артрит – у 148 (67,8%) из 218 и  у 70 (33,2%) из 234 пациентов соответственно (р&lt;0,0001); лихорадка – у 34 (15,6%) из 218 и у 12 (5,1%) из 234 больных соответственно (р&lt;0,0001), анемия – у 58 (26,6%) из 218 и у  26 (11,1%) из 234 пациентов соответственно (р&lt;0,0001); использование ГИБП и/или  системных ГК – у 121(55,5%) из 218 и у 58 (24,8%) из 234 больных соответственно (р&lt;0,0001).</p></sec><sec><title>Выводы</title><p>Выводы. ВП у больных АС ассоциированы с периферическим артритом и показателями воспалительной активности.</p></sec></abstract><trans-abstract xml:lang="en"><p>Extraskeletal manifestations (ESMs) are commonly observed in ankylosing spondylitis (AS). The available data on the association of ESMs with the inflammatory activity and other clinical parameters of AS are contradictory.</p><sec><title>Objective</title><p>Objective: to assess the association of ESMs with the inflammatory activity and other manifestations of AS.</p></sec><sec><title>Patients and methods</title><p>Patients and methods. The investigators of the V.A. Nasonova Research Institute of Rheumatology examined a total of 452 patients (363 men and 89 women) diagnosed with AS meeting the New-York  criteria (1984). The patients' median age was 31.5 [24; 41] years;  median disease onset age, 19.5 [15; 23] years; and disease duration, 11.5 [7; 18] years. HLA B27 was identified in 442 (97.7%) patients. In addition to standard laboratory and instrumental  examinations, 172 patients underwent transthoracic echocardiography; Rehberg's test, if indicated; IgA test; histological  examination of subcutaneous fat tissue or duodenal mucosa for  amyloid; renal ultrasound; colonoscopy; and consultations by an ophthalmologist, a dermatologist, a nephrologist, an urologist,  and a gastroenterologist. Uveitis, cardiac involvement (cardiac conduction disturbance, aortic and valvular changes), inflammatory bowel disease (IBD), glomerulonephritis, and psoriasis were  considered to be ESMs. The latter were detected in 218 (48%) of the 452 patients; there was uveitis in 140 (30%), cardiac conduction  disturbance in 61 (13.4%), psoriasis in 17 (3.7%), IBD in 16  (3.5%), nephritis in 16 (3.5%), and aortic and valvular changes in 71 (41.2%) of the 172 patients. The groups of patients with ESM (n  = 218) and without ESM (n=234) were compared with regard to the  onset age of AS, the presence of HLA- 27, peripheral arthritis,  coxitis, enthesitis, syndesmophytis, fever, anemia, the need for biological agents (BAs) and/or systemic glucocorticoids (GCs), Bath  Ankylosing Spondylitis Disease Activity Index (BASDAI), and  erythrocyte sedimentation rate (ESR). </p></sec><sec><title>Results</title><p>Results. The ESM and non-ESM groups were matched for gender, age, duration of AS, and the presence of HLA-В27. No significant differences were found in ESR, BASDAI, and the frequency of coxitis, enthesitis, and syndesmophytis in the spine. The ESM group versus non-ESM group was significantly more frequently observed to have peripheral arthritis in 148 (67.8%) of the 218 patients and in 70  (33.2%) of the 234 patients, respectively (p&lt;0.0001); fever in 34  (15.6%) and 12 (5.1%), respectively (p&lt;0.0001), anemia in 58  (26.6%) and 26 (11.1%), respectively (p&lt;0.0001); GAs and/or  systemic GCs were taken by 121 (55.5%) and 58 (24.8%) patients, respectively (p&lt;0.0001).</p></sec><sec><title> </title><p> </p></sec><sec><title>Conclusion</title><p>Conclusion. ESMs in patients with AS are associated with peripheral arthritis and inflammatory activity indicators.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>анкилозирующий спондилит</kwd><kwd>внескелетные проявления</kwd><kwd>воспалительная активность</kwd><kwd>периферический артрит</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ankylosing spondylitis</kwd><kwd>extraskeletal manifestations</kwd><kwd>inflammatory activity</kwd><kwd>peripheral arthritis.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Cruyssen B, Ribbens C, Boonen A, et al. The epidemiology of ankylosing spondylitis and the commencement of anti-TNF therapy in daily rheumatology practice. Ann Rheum Dis. 2007 Aug;66(8):1072-7. Epub 2007 Jan 29. doi: 10.1136/ard.2006.064543.</mixed-citation><mixed-citation xml:lang="en">Cruyssen B, Ribbens C, Boonen A, et al. The epidemiology of ankylosing spondylitis and the commencement of anti-TNF therapy in daily rheumatology practice. Ann Rheum Dis. 2007 Aug;66(8):1072-7. Epub 2007 Jan 29. doi: 10.1136/ard.2006.064543.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">El Maghraoui A. Extra-articular manifestations of ankylosing spondylitis: Prevalence, characteristics and therapeutic implications. Eur J Intern Med. 2011 Dec;22(6):554-60. doi: 10.1016/j.ejim.2011.06.006. Epub 2011 Jul 13.</mixed-citation><mixed-citation xml:lang="en">El Maghraoui A. Extra-articular manifestations of ankylosing spondylitis: Prevalence, characteristics and therapeutic implications. Eur J Intern Med. 2011 Dec;22(6):554-60. doi: 10.1016/j.ejim.2011.06.006. Epub 2011 Jul 13.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Zarco P, Gonzalez C, Rodriguez de la Serna A, et al. Extra-articular disease in patients with spondyloarthritis. Baseline characteristics of the spondyloarthritis cohort of the AQUILES study. Reumatol Clin. 2015 Mar-Apr;11(2):83-9. doi: 10.1016/j.reuma.2014.04.003. Epub 2014 Nov 11.</mixed-citation><mixed-citation xml:lang="en">Zarco P, Gonzalez C, Rodriguez de la Serna A, et al. Extra-articular disease in patients with spondyloarthritis. Baseline characteristics of the spondyloarthritis cohort of the AQUILES study. Reumatol Clin. 2015 Mar-Apr;11(2):83-9. doi: 10.1016/j.reuma.2014.04.003. Epub 2014 Nov 11.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Stolwijk C, van Tubergen A, Castillo-Ortiz JD, Boonen A. Prevalence of extra-articular manifestations in patients with ankylosing spondylitis: a systematic review and meta- analysis. Ann Rheum Dis. 2015 Jan;74(1):65-73. doi: 10.1136/annrheumdis-2013-203582. Epub 2013 Sep 2.</mixed-citation><mixed-citation xml:lang="en">Stolwijk C, van Tubergen A, Castillo-Ortiz JD, Boonen A. Prevalence of extra-articular manifestations in patients with ankylosing spondylitis: a systematic review and meta- analysis. Ann Rheum Dis. 2015 Jan;74(1):65-73. doi: 10.1136/annrheumdis-2013-203582. Epub 2013 Sep 2.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Yang P, Wang H, Zhang Z, et al. Clinical diagnosis and treatment of uveitis associated with ankylosing spondylitis. Zhonghua Yan Ke Za Zhi. 2005 Jun;41(6):515-8.</mixed-citation><mixed-citation xml:lang="en">Yang P, Wang H, Zhang Z, et al. Clinical diagnosis and treatment of uveitis associated with ankylosing spondylitis. Zhonghua Yan Ke Za Zhi. 2005 Jun;41(6):515-8.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Gouveia E, Elmann D, Morales M. Ankylosing spondylitis and uveitis: overview. Rev Bras Reumatol. 2012 Oct;52(5):742-56. doi: 10.1590/S0482-50042012000500009.</mixed-citation><mixed-citation xml:lang="en">Gouveia E, Elmann D, Morales M. Ankylosing spondylitis and uveitis: overview. Rev Bras Reumatol. 2012 Oct;52(5):742-56. doi: 10.1590/S0482-50042012000500009.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Brunner F, Kunz A, Weber U, Kissling R. Ankylosing spondylitis and heart abnormalities: do cardiac conduction disorders, valve regurgitation and diastolic dysfunction occur more often in male patients with diagnosed ankylosing spondylitis for over 15 years than in the normal population. Clin Rheumatol. 2006 Feb;25(1):24-9. Epub 2005 Oct 25.</mixed-citation><mixed-citation xml:lang="en">Brunner F, Kunz A, Weber U, Kissling R. Ankylosing spondylitis and heart abnormalities: do cardiac conduction disorders, valve regurgitation and diastolic dysfunction occur more often in male patients with diagnosed ankylosing spondylitis for over 15 years than in the normal population. Clin Rheumatol. 2006 Feb;25(1):24-9. Epub 2005 Oct 25.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Ljung L, Sundströ m B, Smeds J, et al. Patterns of comorbidity and disease characteristics among patients with ankylosing spondylitis-a cross-sectional study. Clin Rheumatol. 2017 Nov 8. doi: 10.1007/s10067-017-3894-0. [Epub ahead of print].</mixed-citation><mixed-citation xml:lang="en">Ljung L, Sundströ m B, Smeds J, et al. Patterns of comorbidity and disease characteristics among patients with ankylosing spondylitis-a cross-sectional study. Clin Rheumatol. 2017 Nov 8. doi: 10.1007/s10067-017-3894-0. [Epub ahead of print].</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Roldan CA, Chavez J, Wiest PW, et al. Aortic root disease associated with ankylosing spondylitis. J Am Coll Cardiol. 1998 Nov; 32(5):1397-404.</mixed-citation><mixed-citation xml:lang="en">Roldan CA, Chavez J, Wiest PW, et al. Aortic root disease associated with ankylosing spondylitis. J Am Coll Cardiol. 1998 Nov; 32(5):1397-404.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Przepiera-Bezak H, Peregud-Pogorzelska M, Brzosko M. Activity of the disease and selected echocardiographic abnormalities in ankylosing spondylitis. Pol Merkur Lekarski. 2006 Mar; 20(117):296-8.</mixed-citation><mixed-citation xml:lang="en">Przepiera-Bezak H, Peregud-Pogorzelska M, Brzosko M. Activity of the disease and selected echocardiographic abnormalities in ankylosing spondylitis. Pol Merkur Lekarski. 2006 Mar; 20(117):296-8.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Essers I, Ramiro S, Stolwijk C, et al. Do extra-articular manifestations influence outcome in ankylosing spondylitis? 12-year results from OASIS. Clin Exp Rheumatol. 2016 Mar- Apr;34(2):214-21. Epub 2016 Feb 2.</mixed-citation><mixed-citation xml:lang="en">Essers I, Ramiro S, Stolwijk C, et al. Do extra-articular manifestations influence outcome in ankylosing spondylitis? 12-year results from OASIS. Clin Exp Rheumatol. 2016 Mar- Apr;34(2):214-21. Epub 2016 Feb 2.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Richette P, Tubach F, BrebanM, et al. soriasis and phenotype of patients with early inя ammatory back pain. Ann Rheum Dis. 2013 Apr;72(4):566-71. doi: 10.1136/annrheumdis-2012-201610. Epub 2012 Jun 7.</mixed-citation><mixed-citation xml:lang="en">Richette P, Tubach F, BrebanM, et al. soriasis and phenotype of patients with early inя ammatory back pain. Ann Rheum Dis. 2013 Apr;72(4):566-71. doi: 10.1136/annrheumdis-2012-201610. Epub 2012 Jun 7.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Peeters AJ, van den Wall Bake AW, van Dalsen AD, Westedt ML. Relation of microscopic haematuria in ankylosing spondylitis to circulating IgA containing immune complexes. Ann Rheum Dis. 1988 Aug;47(8):645-7.</mixed-citation><mixed-citation xml:lang="en">Peeters AJ, van den Wall Bake AW, van Dalsen AD, Westedt ML. Relation of microscopic haematuria in ankylosing spondylitis to circulating IgA containing immune complexes. Ann Rheum Dis. 1988 Aug;47(8):645-7.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Van der Linden S, Valkenburg H, Cats A. Evaluation of diagnostic criteria for ankylosing spondylitis: a proposal to modification of the New York criteria. Arthritis Rheum. 1984 Apr;27(4):361-8.</mixed-citation><mixed-citation xml:lang="en">Van der Linden S, Valkenburg H, Cats A. Evaluation of diagnostic criteria for ankylosing spondylitis: a proposal to modification of the New York criteria. Arthritis Rheum. 1984 Apr;27(4):361-8.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Sieper J, Rudwaleit M, Baraliakos X, et al. The Assessment of SpondyloArthritis international Society (ASAS) handbook: a guide to assess spondyloarthritis. Ann Rheum Dis. 2009 Jun;68 Suppl 2:ii1-44. doi: 10.1136/ard.2008.104018.</mixed-citation><mixed-citation xml:lang="en">Sieper J, Rudwaleit M, Baraliakos X, et al. The Assessment of SpondyloArthritis international Society (ASAS) handbook: a guide to assess spondyloarthritis. Ann Rheum Dis. 2009 Jun;68 Suppl 2:ii1-44. doi: 10.1136/ard.2008.104018.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Bulkley BH, RobertsWC. Ankylosing spondylitis and aortic regurgitation. Description of the characteristic cardiovascular lesion from study of eight necropsy patients. Circulation. 1973 Nov;48(5):1014-27.</mixed-citation><mixed-citation xml:lang="en">Bulkley BH, RobertsWC. Ankylosing spondylitis and aortic regurgitation. Description of the characteristic cardiovascular lesion from study of eight necropsy patients. Circulation. 1973 Nov;48(5):1014-27.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Фейгенбаум Х. Эхокардиография. Москва: Видар; 1999. 491 с. [Feigenbaum Kh. Ekhokardiografiya [Echocardiography]. Moscow: Vidar; 1999. 491 p.]</mixed-citation><mixed-citation xml:lang="en">Фейгенбаум Х. Эхокардиография. Москва: Видар; 1999. 491 с. [Feigenbaum Kh. Ekhokardiografiya [Echocardiography]. Moscow: Vidar; 1999. 491 p.]</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
