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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">vovr</journal-id><journal-title-group><journal-title xml:lang="ru">Высшее образование в России  (Vysshee obrazovanie v Rossii = Higher Education in Russia)</journal-title><trans-title-group xml:lang="en"><trans-title>Vysshee Obrazovanie v Rossii  = Higher Education in Russia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-3617</issn><issn pub-type="epub">2072-0459</issn><publisher><publisher-name>Moscow Polytechnic University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31992/0869-3617-2022-31-4-148-166</article-id><article-id custom-type="elpub" pub-id-type="custom">vovr-3041</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>EDUCATION ONLINE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>EDUCATION ONLINE</subject></subj-group></article-categories><title-group><article-title>Аналитический обзор сервисов цифровой доступности на официальных сайтах ведущих университетов мира</article-title><trans-title-group xml:lang="en"><trans-title>Analytical Review of Digital Accessibility Services on Official Sites of the World’s Best Universities</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3263-9373</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Косова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kosova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Косова Екатерина Алексеевна – канд. пед. наук, доцент</p><p>SPIN-код: <ext-link xlink:href="https://elibrary.ru/author_info.asp?isold=1" ext-link-type="uri">7805-8195</ext-link></p><p>Researcher ID: Q-8089-2017</p><p>295007, Республика Крым, г. Симферополь, проспект Академика Вернадского, 4</p></bio><bio xml:lang="en"><p>Ekaterina A. Kosova – Cand. Sci. (Education), Assoc. Prof.</p><p>Researcher ID: Q-8089-2017</p><p>4, Prospect Vernadskogo, Simferopol 295007</p></bio><email xlink:type="simple">lynx99@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Физико-технический институт Крымского федерального университета им. В. И. Вернадского</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Physics and Technology Institute of V.I. Vernadsky Crimean Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>08</day><month>04</month><year>2022</year></pub-date><volume>31</volume><issue>4</issue><fpage>148</fpage><lpage>166</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Косова Е.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Косова Е.А.</copyright-holder><copyright-holder xml:lang="en">Kosova E.A.</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://vovr.elpub.ru/jour/article/view/3041">https://vovr.elpub.ru/jour/article/view/3041</self-uri><abstract><p>Проблема разработки электронного образовательного контента, доступного для всех обучающихся, включая лиц с ограниченными возможностями здоровья, приобретает особую актуальность в контексте глобальных тенденций высшего образования, связанных с массовым переходом обучения в дистанционный и смешанный формат. Путём анализа контента официальных сайтов 25 лучших университетов мира (по версии QS World University Rankings 2021) систематизированы данные об университетских вебсервисах поддержки цифровой доступности (ЦД) с целью формирования методологической стратегии создания аналогичных служб в университетах России. Поиск данных осуществлялся методом тотального просмотра рубрик университетских сайтов и по ключевым словам; регистрировались данные об административной поддержке и проектной деятельности в сфере ЦД. Обнаружено, что подавляющее большинство университетов активно занимаются ЦД и имеют соответствующие веб-сервисы, в контенте которых размещена информация по рубрикам: обучение и повышение квалификации в сфере ЦД; руководство по разработке доступного контента и тестированию ЦД; консультирование по вопросам ЦД; экспертиза ЦД и др. На основании результатов выполненного анализа разработан и опубликован пилотный веб-ресурс, содержащий информационно-консультативные материалы для разработчиков цифрового контента по вопросам обеспечения ЦД электронного обучения.</p></abstract><trans-abstract xml:lang="en"><p>The paper discusses the problem of e-learning accessibility for persons with disabilities. Development of e-learning content accessible to all students is gaining special relevance in the context of global trends in higher education related to the massive transition of learning to distance and hybrid formats. Based on the analysis of the official websites of 25 world’s top universities (according to the QS World University Rankings 2021), data on university digital accessibility services were systematized. The data search was carried out by total browsing of university sites’ structure and headings and by keywords. Data on 14 checklist categories were registered. Signs of administrative and project activities in the field of digital accessibility were found for 20 universities (80%), among which 10 (40%) have specialized structural subdivisions for digital accessibility. The content of digital accessibility web services contains data on the following topics: training in digital accessibility for educational content for authors and developers (14 university sites – 56%); a guide for authors (15–60%) and web developers (12–48%); consulting and assistance for authors and web developers (17–68%); accessibility examination (5–20%); legal norms (11–44%) and accessibility standards (16–64%); accessibility testing guide (16–64%); procurement requirements for accessible web products and services (8–32%); frequently asked questions (6–24%), etc. Based on the results of the analysis, the model of university digital accessibility services was developed and corresponding web site was published. It seems important to create similar web resources and corresponding structural subdivisions in universities of the Russian Federation, as well as to approve the intra-university local acts regulating the mandatory fulfillment of digital accessibility requirements in the development of educational content and the procurement of digital products and services. GOST R 52872-2019, based on WCAG 2.1, should be used as the basis for local legal regulations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>электронный образовательный контент</kwd><kwd>цифровая доступность</kwd><kwd>вебдоступность</kwd><kwd>электронное обучение</kwd><kwd>лица с ограниченными возможностями здоровья</kwd><kwd>лучшие университеты мира</kwd><kwd>сервисы цифровой доступности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>e-learning</kwd><kwd>e-learning content</kwd><kwd>digital accessibility</kwd><kwd>web accessibility</kwd><kwd>people with disabilities</kwd><kwd>world’s top universities</kwd><kwd>digital accessibility services</kwd><kwd>digital accessibility requirements</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">Meleo-Erwin Z., Kollia B., Fera J., Jahren A., Basch C. Online Support Information for Students with Disabilities in Colleges and Universities During the COVID‑19 Pandemic // Disability and Health Journal. 2020. Vol. 4. Issue 1. Art. no. 101013. DOI: 10.1016/j.dhjo.2020.101013</mixed-citation><mixed-citation xml:lang="en">Meleo-Erwin, Z., Kollia, B., Fera, J., Jahren, A., Basch, C. (2020). Online Support Information for Students with Disabilities in Colleges and Universities During the COVID‑19 Pandemic. Disability and Health Journal. Vol. 4, Issue 1, art. no. 101013, doi: 10.1016/j.dhjo.2020.101013</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">García-Morales V.J., Garrido-Moreno A, Martín-Rojas R. The Transformation of Higher Education After the COVID Disruption: Emerging Challenges in an Online Learning Scenario // Frontiers in Psychology. 2021. Vol. 12. Art. no. 616059. DOI: 10.3389/fpsyg.2021.616059</mixed-citation><mixed-citation xml:lang="en">García-Morales, V.J., Garrido-Moreno, A, Martín-Rojas, R (2021). The Transformation of Higher Education After the COVID Disruption: Emerging Challenges in an Online Learning Scenario. Frontiers in Psychology.Vol. 12, art. no. 616059, doi: 10.3389/fpsyg.2021.616059</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Lazar J. Managing digital accessibility at universities during the COVID-19 pandemic // Universal Access in the Information Society. 2021. March 08. DOI: https://doi.org/10.1007/s10209-021-00792-5</mixed-citation><mixed-citation xml:lang="en">Lazar, J. (2021). Managing Digital Accessibility at Universities During the COVID-19 Pandemic. Universal Access in the Information Society, March 08, doi: https://doi.org/10.1007/s10209-021-00792-5</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Kent M. Disability and eLearning: Opportunities and Barriers // Disability Studies Quarterly. 2015. Vol. 35. No. 1. URL: https://dsq-sds.org/article/view/3815/3830 (дата обращения: 22.01.2022).</mixed-citation><mixed-citation xml:lang="en">Kent, M. (2015). Disability and eLearning: Opportunities and Barriers. Disability Studies Quarterly. Vol. 35, no. 1. Available at: https://dsq-sds.org/article/view/3815/3830 (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Shawn L.H. (Ed.) Introduction to Web Accessibility // W3C Web Accessibility Initiative (WAI). 2021. Oct 6. URL: https://www.w3.org/WAI/fundamentals/accessibilityintro/#what (дата обращения: 22.01.2022)</mixed-citation><mixed-citation xml:lang="en">Shawn, L.H. (Ed.) (2021). Introduction to Web Accessibility. W3C Web Accessibility Initiative (WAI). Oct 6. Available at: https://www.w3.org/WAI/fundamentals/accessibility-intro/#what (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Caldwell B., Cooper M., Guarino Reid L., Vanderheiden G. (Eds). Web Content Accessibility Guidelines (WCAG) 2.0 // World Wide Web Consortium (W3C). 2008. Dec 11. URL: https://www.w3.org/TR/WCAG20/ (дата обращения: 22.01.2022)</mixed-citation><mixed-citation xml:lang="en">Caldwell B., Cooper, M., Guarino Reid, L., Vanderheiden, G. (Eds). (2008). Web Content Accessibility Guidelines (WCAG) 2.0. World Wide Web Consortium (W3C). Dec 11. Available at: https://www.w3.org/TR/WCAG20/ (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Kirkpatrick A., O’ Connor J., Campbell A., Cooper M. (Eds). Web Content Accessibility Guidelines (WCAG) 2.1 // World Wide Web Consortium (W3C). 2018. June 5. URL: https://www.w3.org/TR/2018/REC-WCAG21-20180605/(дата обращения: 22.01.2022)</mixed-citation><mixed-citation xml:lang="en">Kirkpatrick, A., O’ Connor, J., Campbell, A., Cooper, M. (Eds). (2018). Web Content Accessibility Guidelines (WCAG) 2.1. World Wide Web Consortium (W3C). June 5. Available at: https://www.w3.org/TR/2018/REC-WCAG21-20180605/ (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Fichten C.S., Ferraro V., Asuncion J.V., Chwojka C., Barile M., Nguyen M.N., Klomp R., Wolforth J. Disabilities and e-Learning Problems and Solutions: An Exploratory Study // Educational Technology &amp; Society. 2009. Vol. 12. No. 4. P. 241–256. URL: https://adaptech.org/wp-content/uploads/abDisabilitiesAndE-LearningProblems.pdf (дата обращения: 22.01.2022).</mixed-citation><mixed-citation xml:lang="en">Fichten, C.S., Ferraro, V., Asuncion, J.V., Chwojka, C., Barile, M., Nguyen, M.N., Klomp, R., Wolforth, J. (2009). Disabilities and e-Learning Problems and Solutions: An Exploratory Study. Educational Technology &amp; Society. Vol. 12, no. 4, pp. 241-256. Available at: https://adaptech.org/wp-content/uploads/abDisabilitiesAndE-LearningProblems.pdf (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Van de Bunt-Kokhuis S., Bolger M. Talent competences in the new eLearning generation // eLearning Papers. 2009. No. 15. p. 1–12. URL: https://www.slideshare.net/elearningpapers/talentcompetences (дата обращения: 22.01.2022)</mixed-citation><mixed-citation xml:lang="en">Van de Bunt-Kokhuis, S., Bolger, S. (2009). Talent Competences in the New eLearning Generation. eLearning Papers. No. 15, pp. 1-12. Available at: https://www.slideshare.net/elearningpapers/talentcompetences (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Boudreau D. Social Media Accessibility: Where are we today? A modest attempt at awakening the giants // Technical training session CSUN 12 Access U Build, San Diego, March 1st, 2012. URL: https://www.slideshare.net/AccessibiliteWeb/20120301-web041socialmedia (дата обращения: 22.01.2022).</mixed-citation><mixed-citation xml:lang="en">Boudreau, D. (2012). Social Media Accessibility: Where Are We Today? A Modest Attempt at Awakening the Giants. In: Technical Training Session CSUN 12 Access U Build. San Diego, March 1st. Available at: https://www.slideshare.net/AccessibiliteWeb/20120301-web041socialmedia (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Calvo R., Iglesias A., Moreno L. Is Moodle Accessible for visually impaired people? // Filipe J., Cordeiro J. (Eds). Web Information Systems and Technologies: 7th International Conference, WEBIST, Noordwijkerhout, The Netherlands, 6–9 May, 2011. P. 207–220.</mixed-citation><mixed-citation xml:lang="en">Calvo, R., Iglesias, A., Moreno, L. (2011). Is Moodle Accessible for Visually Impaired People? In: Filipe, J., Cordeiro, J. (Eds). Web Information Systems and Technologies: 7th International Conference, WEBIST, Noordwijkerhout, The Netherlands, 6–9 May, pp. 207-220.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Sanderson N.C., Chen W., Bong W.K., Kessel S. The accessibility of MOOC Platforms from Instructors’ Perspective // Antona M., Stephanidis C. (Eds). Proceedings of the 10th International Conference on Universal Access in Human- Computer Interaction (UAHCI), Springer, 2016. P. 124–134.</mixed-citation><mixed-citation xml:lang="en">Sanderson, N.C., Chen, W., Bong, W.K., Kessel, S. (2016). The Accessibility of MOOC Platforms from Instructors’ Perspective. In: Antona, M., Stephanidis, C. (Eds). Proceedings of the 10th International Conference on Universal Access in Human-Computer Interaction (UAHCI). Springer, pp. 124–134.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Martın J.L., Amado-Salvatierra H.R., Hilera J.R. MOOCs for all: Evaluating the accessibility of top MOOC platforms // International Journal of Engineering Education. 2016. Vol. 32. No. 5-B. P. 2374–2383.</mixed-citation><mixed-citation xml:lang="en">Martın, J.L., Amado-Salvatierra, H.R., Hilera, J.R. (2016). MOOCs for All: Evaluating the Accessibility of Top MOOC Platforms. International Journal of Engineering Education. Vol. 32, No. 5-B, pp. 2374–2383.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Ferati M., Mripa N., Bunjaku R. Accessibility of MOOCs for blind people in developing non- English speaking countries // Di Bucchianico G., Kercher P. (Eds). Advances in Design for Inclusion. Advances in Intelligent Systems and Computing. Springer, Cham. 2016. Vol. 500. P. 519–528. DOI: 10.1007/978-3-319-41962-6_46</mixed-citation><mixed-citation xml:lang="en">Ferati, M., Mripa, N., Bunjaku, R. (2016). Accessibility of MOOCs for Blind People in Developing Non- English Speaking Countries. In: Di Bucchianico, G., Kercher, P. (Eds). Advances in Design for Inclusion. Advances in Intelligent Systems and Computing. Springer, Cham. Vol. 500, pp. 519-528, doi: 10.1007/978-3-319-41962-6_46</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Akgül Y. Accessibility evaluation of MOOCs websites of Turkey // Journal of Life Economics. 2018. No. 5. P. 23–36. DOI: 10.15637/jlecon.259</mixed-citation><mixed-citation xml:lang="en">Akgül, Y. (2018). Accessibility Evaluation of MOOCs Websites of Turkey. Journal of Life Economics. No. 5, p. 23-36, doi: 10.15637/jlecon.259</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Sanchez-Gordon S., Luján-Mora S. Research challenges in accessible MOOCs: A systematic literature review 2008–2016 // Universal Access in the Information Society. 2018. Vol. 17. No. 4. P. 775-789. DOI: 10.1007/s10209-017-0531-2</mixed-citation><mixed-citation xml:lang="en">Sanchez-Gordon, S., Luján-Mora, S. (2018). Research Challenges in Accessible MOOCS: A Systematic Literature Review 2008–2016. Universal Access in the Information Society. Vol. 17, no. 4, pp. 775-789, doi: 10.1007/s10209-017-0531-2</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Kouroupetroglou G., Pino A., Kacorri H. A Model of Accessibility Services Provision for Students with Disabilities in Higher Education // Proceedings of the International Conference Universal Learning Design, 8–11 February, Brno, 2011. URL: https://terpconnect.umd.edu/~hernisa/pub/2011-uld-kacorri-kouroupetroglou.pdf (дата обращения: 22.01.2022).</mixed-citation><mixed-citation xml:lang="en">Kouroupetroglou, G., Pino, A., Kacorri, H. (2011). A Model of Accessibility Services Provision for Students with Disabilities in Higher Education. In: Proceedings of the International Conference Universal Learning Design, 8-11 February, Brno. Available at: https://terpconnect.umd.edu/~hernisa/pub/2011-uld-kacorri-kouroupetroglou.pdf (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Fichten C., Asuncion J., Wolforth J., Barile M., Budd J., Martiniello N., Amsel R. Information and communication technology related needs of college and university students with disabilities // Research in Learning Technology. 2012. No. 20. DOI: 10.3402/rlt.v20i0.18646</mixed-citation><mixed-citation xml:lang="en">Fichten, C., Asuncion, J., Wolforth, J., Barile, M., Budd, J., Martiniello, N., Amsel, R. (2012). Information and Communication Technology Related Needs of College and University Students with Disabilities. Research in Learning Technology. No. 20, doi: 10.3402/rlt.v20i0.18646</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Charmatz M. Colleges and universities cannot contract away ADA/504 obligations // Disability Compliance for Higher Education. 2021. Vol. 21. No. 8. P. 3. DOI: 10.1002/dhe.31005</mixed-citation><mixed-citation xml:lang="en">Charmatz, M. (2021). Colleges and Universities Cannot Contract Away ADA/504 Obligations. Disability Compliance for Higher Education. Vol. 21, no. 8, pp. 3, doi: 10.1002/dhe.31005</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Mullin C., Gould R., Parker Harris S. ADA Research Brief: Digital Access for Students in Higher Education and the ADA. Chicago, IL: ADA National Network Knowledge Translation Center. 2021, pp. 1–12. URL: https://adata.org/research_brief/research-brief-digital-access- students-higher-education-and-ada (дата обращения: 22.01.2022)</mixed-citation><mixed-citation xml:lang="en">Mullin, C., Gould, R., Parker Harris, S. (2021). ADA Research Brief: Digital Access for Students in Higher Education and the ADA. Chicago, IL: ADA National Network Knowledge Translation Center, pp. 1-12. Available at: https://adata.org/research_brief/research-brief-digital-access-students-higher-education-and-ada (accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Weissman S. Universities Face Digital Accessibility Lawsuits as Pandemic Continues // Diverse: Issues in Higher Education. 2020. Sept 8. URL: https://www.diverseeducation.com/demographics/disabilties/article/15107724/universities-face-digital-accessibility-lawsuits-as-pandemic-continues (дата обращения: 22.01.2022).</mixed-citation><mixed-citation xml:lang="en">Weissman S. (2020). Universities Face Digital Accessibility Lawsuits as Pandemic Continues. Diverse: Issues in Higher Education. Sept 8. Available at: https://www.diverseeducation.com/demographics/disabilties/article/15107724/universities-face-digital-accessibility-lawsuits-as-pandemic-continues ((accessed 22.01.2022).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Косова Е.А. Нормативные основания обеспечения доступности электронного обучения для лиц с ограниченными возможностями здоровья в Российской Федерации // Непрерывное образование: XXI век. 2020. Вып. 2 (30). DOI: 10.15393/j5.art.2020.5692</mixed-citation><mixed-citation xml:lang="en">Kosova, E.A. (2020). The Accessibility of e-Learning for the Disabled in the Russian Federation: Legal Framework. Nepreryvnoe obrazovanie: XXI vek [Lifelong Education: The XXI Century]. No. 2(30), doi: 10.15393/j5.art.2020.5692 (In Russ., abstract in Eng.).</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>
