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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">russjcardiol</journal-id><journal-title-group><journal-title xml:lang="ru">Российский кардиологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Cardiology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1560-4071</issn><issn pub-type="epub">2618-7620</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15829/1560-4071-2024-6009</article-id><article-id custom-type="edn" pub-id-type="custom">VDGLJQ</article-id><article-id custom-type="elpub" pub-id-type="custom">russjcardiol-6009</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 СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Фибрилляция предсердий как осложнение эндоваскулярного закрытия открытого овального окна: клиническое исследование</article-title><trans-title-group xml:lang="en"><trans-title>Atrial fibrillation as a complication of endovascular patent foramen ovale closure: a clinical trial</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4198-0522</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Терещенко</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tereshchenko</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. м. н., с. н. с. отдела рентген-эндоваскулярных методов диагностики и лечения</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">Andrew034@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8600-3189</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арутюнян</surname><given-names>Г. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Arutyunyan</surname><given-names>G. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. м. н., н. с. отдела рентген-эндоваскулярных методов диагностики и лечения</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">argoar@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8193-8575</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Меркулов</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Merkulov</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д. м. н., г. н. с. отдела рентгенэндоваскулярных методов диагностики и лечения</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">ev.merkulov@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ Национальный медицинский исследовательский центр кардиологии им. акад. Е. И. Чазова Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Chazov National Medical Research Center of Cardiology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>24</day><month>06</month><year>2024</year></pub-date><volume>29</volume><issue>12S</issue><issue-title>Диссертационные статьи</issue-title><fpage>6009</fpage><lpage>6009</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Терещенко А.С., Арутюнян Г.К., Меркулов Е.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Терещенко А.С., Арутюнян Г.К., Меркулов Е.В.</copyright-holder><copyright-holder xml:lang="en">Tereshchenko A.S., Arutyunyan G.K., Merkulov E.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://russjcardiol.elpub.ru/jour/article/view/6009">https://russjcardiol.elpub.ru/jour/article/view/6009</self-uri><abstract><p>Одним из известных потенциальных осложнений, связанных с эндоваскулярным закрытием открытого овального окна (ООО), является развитие фибрилляции предсердий (ФП) de novo.</p><sec><title>Цель</title><p>Цель. Оценка факторов риска и частоты развития ФП de novo у пациентов, которым было выполнено эндоваскулярное закрытие ООО.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. Проанализированы данные 276 пациентов, которым выполнялось эндоваскулярное закрытие ООО за период с 2020 по 2023гг в ФГБУ "НМЦИК им. акад. Е. И. Чазова". Всем больным выполнялся объем обследований, соответствующий клиническим рекомендациям. Наличие ФП de novo в послеоперационном периоде оценивалось на основании данных холтеровского мониторирования электрокардиограммы, в течение 1, 6 и 12 мес. после вмешательства — на основании данных электрокардиограммы. По результатам однофакторного регрессионного анализа выявлялись факторы риска, ассоциированные с развитием ФП de novo.</p></sec><sec><title>Результаты</title><p>Результаты. ФП de novo в послеоперационном периоде была зарегистрирована у 2 пациентов. Через 1 мес. после вмешательства эпизоды ФП диагностированы у 6 больных, через 6 мес. у 3 пациентов сохранялся ритм ФП, выявленный ранее, новые случаи были отмечены у 3 больных. Через 12 мес. после вмешательства ФП зарегистрирована у 2 больных. По результатам регрессионного анализа с наличием ФП de novo ассоциировались следующие показатели: возраст ≥52,0 лет (hazard ratio (HR) 6,22; 95% доверительный интервал (ДИ): 1,51-25,56), индекс массы тела ≥28,07 кг/м2 (HR 8,48; 95% ДИ: 1,72-41,73), балл по CHARGE-AF ≥0,56 (HR 4,59; 95% ДИ: 1,12-18,82), размер левого предсердия ≥4,00 см (HR 19,56; 95% ДИ: 2,10-181,88), LAVi ≥34 мл/м2 (HR 45,67; 95% ДИ: 5,46-381,83) по данным эхокардиографии.</p></sec><sec><title>Заключение</title><p>Заключение. Признаки дилатации левого предсердия и левого желудочка по данным эхокардиографии значимо ассоциировались с высоким риском развития ФП de novo в ближайшем и отдаленном периодах после эндоваскулярного закрытия ООО.</p></sec></abstract><trans-abstract xml:lang="en"><p>One of the known potential complications associated with endovascular closure of the patent foramen ovale (PFO) is de novo atrial fibrillation (AF).</p><sec><title>Aim</title><p>Aim. To assess the risk factors and incidence of de novo AF in patients who underwent endovascular PFO closure.</p></sec><sec><title>Material and methods</title><p>Material and methods. The data of 276 patients who underwent endovascular PFO closure for the period from 2020 to 2023 at the Chazov National Medical Research Center of Cardiology were analyzed. All patients underwent examinations in accordance with clinical guidelines. De novo AF in the postoperative period was assessed by Holter monitoring, while 1, 6 and 12 months after the intervention — by electrocardiographic recording. Based on univariate regression analysis, risk factors associated with de novo AF were identified.</p></sec><sec><title>Results</title><p>Results. De novo AF in the postoperative period was registered in 2 patients. One month after the intervention, AF episodes were diagnosed in 6 patients. After 6 months, AF detected earlier persisted in 3 patients,and there were 3 new cases. Twelve months after the intervention, AF was recorded in 2 patients. According to regression analysis, the following parameters were associated with de novo AF: age ≥52,0 years (hazard ratio (HR) 6,22; 95% confidence interval (CI): 1,51-25,56), body mass index ≥28,07 kg/m2 (HR 8,48; 95% CI: 1,72-41,73), CHARGE-AF score ≥0,56 (HR 4,59; 95% CI: 1,12-18,82), left atrial size ≥4,00 cm (HR 19,56; 95% CI: 2,10-181,88), LAVi ≥34 ml/m2 (HR 45,67; 95% CI: 5,46-381,83) according to echocardiography.</p></sec><sec><title>Conclusion</title><p>Conclusion. Echocardiographic signs of left atrial and left ventricular dilation were significantly associated with a high risk of de novo AF in the immediate and longterm periods after endovascular PFO closure.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>открытое овальное окно</kwd><kwd>эндоваскулярное закрытие ООО</kwd><kwd>фибрилляция предсердий</kwd><kwd>осложнение эндоваскулярного закрытия</kwd><kwd>криптогенный инсульт</kwd></kwd-group><kwd-group xml:lang="en"><kwd>patent foramen ovale</kwd><kwd>endovascular PFO closure</kwd><kwd>atrial fibrillation</kwd><kwd>complication of endovascular closure</kwd><kwd>cryptogenic stroke</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">-</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Badoz M, Derimay F, Serzian G, et al. Incidence of atrial fibrillation in cryptogenic stroke with patent foramen ovale closure: protocol for the prospective, observational PFO-AF study. BMJ Open. 2023;13(9):e074584. doi:10.1136/bmjopen-2023-074584.</mixed-citation><mixed-citation xml:lang="en">Badoz M, Derimay F, Serzian G, et al. Incidence of atrial fibrillation in cryptogenic stroke with patent foramen ovale closure: protocol for the prospective, observational PFO-AF study. BMJ Open. 2023;13(9):e074584. doi:10.1136/bmjopen-2023-074584.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Mas JL, Derumeaux G, Guillon B, et al. Patent foramen ovale closure or anticoagulation vs. antiplatelets after stroke. New England Journal of Medicine. 2017;377(11):1011-21. doi:10.1056/NEJMoa1705915.</mixed-citation><mixed-citation xml:lang="en">Mas JL, Derumeaux G, Guillon B, et al. Patent foramen ovale closure or anticoagulation vs. antiplatelets after stroke. New England Journal of Medicine. 2017;377(11):1011-21. doi:10.1056/NEJMoa1705915.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Sondergaard L, Kasner SE, Rhodes JF, et al. Patent foramen ovale closure or antiplatelet therapy for cryptogenic stroke. New England Journal of Medicine. 2017;377(11):1033-42. doi:10.1056/NEJMoa1707404.</mixed-citation><mixed-citation xml:lang="en">Sondergaard L, Kasner SE, Rhodes JF, et al. Patent foramen ovale closure or antiplatelet therapy for cryptogenic stroke. New England Journal of Medicine. 2017;377(11):1033-42. doi:10.1056/NEJMoa1707404.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Pristipino C, Sievert H, D'ascenzo F, et al. European position paper on the management of patients with patent foramen ovale. General approach and left circulation thromboembolism. EuroIntervention. 2019;14:1389-402. doi:10.4244/EIJ-D-18-00622.</mixed-citation><mixed-citation xml:lang="en">Pristipino C, Sievert H, D'ascenzo F, et al. European position paper on the management of patients with patent foramen ovale. General approach and left circulation thromboembolism. EuroIntervention. 2019;14:1389-402. doi:10.4244/EIJ-D-18-00622.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Chen JZJ, Thijs VN. Atrial fibrillation following patent Foramen Ovale closure: systematic review and meta-analysis of observational studies and clinical trials. Stroke. 2021;52(5):1653-61. doi:10.1161/STROKEAHA.120.030293.</mixed-citation><mixed-citation xml:lang="en">Chen JZJ, Thijs VN. Atrial fibrillation following patent Foramen Ovale closure: systematic review and meta-analysis of observational studies and clinical trials. Stroke. 2021;52(5):1653-61. doi:10.1161/STROKEAHA.120.030293.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Guedeney P, Laredo M, Zeitouni M, et al. Supraventricular arrhythmia following patent foramen ovale percutaneous closure. JACC: Cardiovascular Interventions. 2022; 15(22):2315-22. doi:10.1016/j.jcin.2022.07.044.</mixed-citation><mixed-citation xml:lang="en">Guedeney P, Laredo M, Zeitouni M, et al. Supraventricular arrhythmia following patent foramen ovale percutaneous closure. JACC: Cardiovascular Interventions. 2022; 15(22):2315-22. doi:10.1016/j.jcin.2022.07.044.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Andersen A, Matzen KL, Andersen G, et al. Atrial fibrillation after closure of patent foramen ovale in the REDUCE clinical study. Catheterization and Cardiovascular Interventions. 2022;99(5):1551-7. doi:10.1002/ccd.30019.</mixed-citation><mixed-citation xml:lang="en">Andersen A, Matzen KL, Andersen G, et al. Atrial fibrillation after closure of patent foramen ovale in the REDUCE clinical study. Catheterization and Cardiovascular Interventions. 2022;99(5):1551-7. doi:10.1002/ccd.30019.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Lee PH, Song JK, Kim JS, et al. Cryptogenic stroke and high-risk patent foramen ovale: the DEFENSE-PFO trial. Journal of the American College of Cardiology. 2018;71(20): 2335-42. doi:10.1016/j.jacc.2018.02.046.</mixed-citation><mixed-citation xml:lang="en">Lee PH, Song JK, Kim JS, et al. Cryptogenic stroke and high-risk patent foramen ovale: the DEFENSE-PFO trial. Journal of the American College of Cardiology. 2018;71(20): 2335-42. doi:10.1016/j.jacc.2018.02.046.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Jurczyk D, Macherey-M eyer S, Rawish E, et al. New-onset atrial fibrillation after percutaneous patent foramen ovale closure: a meta-analysis. Clinical Research in Cardiology. 2023;112(12):1824-34. doi:10.1007/s00392-023-02263-8.</mixed-citation><mixed-citation xml:lang="en">Jurczyk D, Macherey-M eyer S, Rawish E, et al. New-onset atrial fibrillation after percutaneous patent foramen ovale closure: a meta-analysis. Clinical Research in Cardiology. 2023;112(12):1824-34. doi:10.1007/s00392-023-02263-8.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Apostolos A, Tsiachris D, Drakopoulou M, et al. Atrial fibrillation after patent foramen Ovale closure: incidence, pathophysiology, and management. Journal of the American Heart Association. 2024;13(9):e034249. doi:10.1161/jaha.124.034249.</mixed-citation><mixed-citation xml:lang="en">Apostolos A, Tsiachris D, Drakopoulou M, et al. Atrial fibrillation after patent foramen Ovale closure: incidence, pathophysiology, and management. Journal of the American Heart Association. 2024;13(9):e034249. doi:10.1161/jaha.124.034249.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Бокерия Л. А., Архипов А. Н., Болотова Е. В. и др. Клинические рекомендации по ведению взрослых пациентов с врожденными пороками сердца. М.: НЦССХ им. АН Бакулева РАМН, 2010. c. 358. ISBN: 978-5-7982-0258-4.</mixed-citation><mixed-citation xml:lang="en">Bokeriya LA, Arkhipov AN, Bolotova EV, еt аl. Clinical guidelines for the management of adult patients with congenital heart defects. M.: A. N. Bakulev Scientific Center for Cardiovascular Surgery of the Russian Academy of Medical Sciences, 2010. p. 358. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Kent DM, Ruthazer R, Weimar C, et al. An index to identify stroke-r elated vs incidental patent foramen ovale in cryptogenic stroke. Neurology. 2013;81(7):619-25. doi:10.1212/WNL.0b013e3182a08d59.</mixed-citation><mixed-citation xml:lang="en">Kent DM, Ruthazer R, Weimar C, et al. An index to identify stroke-r elated vs incidental patent foramen ovale in cryptogenic stroke. Neurology. 2013;81(7):619-25. doi:10.1212/WNL.0b013e3182a08d59.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Goudis C, Daios S, Dimitriadis F, et al. CHARGE-AF: a useful score for atrial fibrillation prediction? Current Cardiology Reviews. 2023;19(2):5-10. doi:10.2174/1573403X18666220901102557.</mixed-citation><mixed-citation xml:lang="en">Goudis C, Daios S, Dimitriadis F, et al. CHARGE-AF: a useful score for atrial fibrillation prediction? Current Cardiology Reviews. 2023;19(2):5-10. doi:10.2174/1573403X18666220901102557.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Olivares-R eyes A, Chan S, Lazar EJ, et al. Atrial septal aneurysm: a new classification in two hundred five adults. Journal of the American Society of Echocardiography. 1997; 10(6):644-56. doi:10.1016/s0894-7317(97)70027-0.</mixed-citation><mixed-citation xml:lang="en">Olivares-R eyes A, Chan S, Lazar EJ, et al. Atrial septal aneurysm: a new classification in two hundred five adults. Journal of the American Society of Echocardiography. 1997; 10(6):644-56. doi:10.1016/s0894-7317(97)70027-0.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Elgendy AY, Elgendy IY, Mojadidi MK, et al. New-onset atrial fibrillation following percutaneous patent foramen ovale closure: a systematic review and meta-analysis of randomised trials. EuroIntervention. 2019;14(17):1788-90. doi:10.4244/EIJ-D-18-00767.</mixed-citation><mixed-citation xml:lang="en">Elgendy AY, Elgendy IY, Mojadidi MK, et al. New-onset atrial fibrillation following percutaneous patent foramen ovale closure: a systematic review and meta-analysis of randomised trials. EuroIntervention. 2019;14(17):1788-90. doi:10.4244/EIJ-D-18-00767.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Skibsted CV, Korsholm K, Pedersen L, et al. Long-term risk of atrial fibrillation or flutter after transcatheter patent foramen ovale closure: a nationwide Danish study. European Heart Journal. 2023;44(36):3469-77. doi:10.1093/eurheartj/ehad305.</mixed-citation><mixed-citation xml:lang="en">Skibsted CV, Korsholm K, Pedersen L, et al. Long-term risk of atrial fibrillation or flutter after transcatheter patent foramen ovale closure: a nationwide Danish study. European Heart Journal. 2023;44(36):3469-77. doi:10.1093/eurheartj/ehad305.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Bridges ND, Hellenbrand W, Latson L, et al. Transcatheter closure of patent foramen ovale after presumed paradoxical embolism. Circulation. 1992;86(6):1902-8. doi:10.1161/01.CIR.86.6.1902.</mixed-citation><mixed-citation xml:lang="en">Bridges ND, Hellenbrand W, Latson L, et al. Transcatheter closure of patent foramen ovale after presumed paradoxical embolism. Circulation. 1992;86(6):1902-8. doi:10.1161/01.CIR.86.6.1902.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Жолбаева А. З., Табина А. Е., Голухова Е. З. Молекулярные механизмы фибрилляции предсердий: в поиске "идеального" маркера. Креативная кардиология. 2015;2:40-53. doi:10.15275/kreatkard.2015.02.04.</mixed-citation><mixed-citation xml:lang="en">Zholbayeva AZ, Tabina AE, Golukhova EZ. Molecular mechanisms of atrial fibrillation: "ideal" marker searching. Kreativnaya kardiologiya. 2015;2:40-53. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Alonso A, Krijthe BP, Aspelund T, et al. Simple risk model predicts incidence of atrial fibrillation in a racially and geographically diverse population: the CHARGE‐AF consortium. Journal of the American Heart Association. 2013;2(2):e000102. doi:10.1161/JAHA.112.000102.</mixed-citation><mixed-citation xml:lang="en">Alonso A, Krijthe BP, Aspelund T, et al. Simple risk model predicts incidence of atrial fibrillation in a racially and geographically diverse population: the CHARGE‐AF consortium. Journal of the American Heart Association. 2013;2(2):e000102. doi:10.1161/JAHA.112.000102.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Yoon YE, Oh IY, Kim SA, et al. Echocardiographic predictors of progression to persistent or permanent atrial fibrillation in patients with paroxysmal atrial fibrillation (E6P study). Journal of the American Society of Echocardiography. 2015;28(6):709-17. doi:10.1016/j.echo.2015.01.017.</mixed-citation><mixed-citation xml:lang="en">Yoon YE, Oh IY, Kim SA, et al. Echocardiographic predictors of progression to persistent or permanent atrial fibrillation in patients with paroxysmal atrial fibrillation (E6P study). Journal of the American Society of Echocardiography. 2015;28(6):709-17. doi:10.1016/j.echo.2015.01.017.</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>
