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Calcific aortic valve disease: Not simply a degenerative process: A review and agenda for research from the National Heart and Lung and Blood Institute Aortic Stenosis Working Group. Executive summary: Calcific aortic valve disease-2011 update. <i>Circulation<\/i> 2011; 124: 1783\u20131791.","DOI":"10.1161\/CIRCULATIONAHA.110.006767"},{"key":"7","doi-asserted-by":"publisher","unstructured":"7. Lang RM, Badano LP, Mor-Avi V, Afilalo J, Armstrong A, Ernande L, et al. Recommendations for cardiac chamber quantification by echocardiography in adults: An update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. <i>J Am Soc Echocardiogr<\/i> 2015; 28: 1\u201339.e14, doi:10.1016\/j.echo.2014.10.003.","DOI":"10.1016\/j.echo.2014.10.003"},{"key":"8","doi-asserted-by":"crossref","unstructured":"8. Baumgartner H, Hung J, Bermejo J, Chambers JB, Edvardsen T, Goldstein S, et al. 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Baumgartner H, Falk V, Bax JJ, De Bonis M, Hamm C, Holm PJ, et al. 2017 ESC\/EACTS Guidelines for the management of valvular heart disease. <i>Eur Heart J<\/i> 2017; 38: 2739\u20132791, doi:10.1093\/eurheartj\/ehx391.","DOI":"10.1093\/eurheartj\/ehx391"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Clavel MA, Messika-Zeitoun D, Pibarot P, Aggarwal SR, Malouf J, Araoz PA, et al. The complex nature of discordant severe calcified aortic valve disease grading: New insights from combined Doppler echocardiographic and computed tomographic study. <i>J Am Coll Cardiol<\/i> 2013; 62: 2329\u20132338.","DOI":"10.1016\/j.jacc.2013.08.1621"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Clavel MA, Magne J, Pibarot P. Low-gradient aortic stenosis. <i>Eur Heart J<\/i> 2016; 37: 2645\u20132657.","DOI":"10.1093\/eurheartj\/ehw096"},{"key":"14","doi-asserted-by":"publisher","unstructured":"14. Zoghbi WA, Adams D, Bonow RO, Enriquez-Sarano M, Foster E, Grayburn PA, et al. 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Functional classification of aortic root\/valve abnormalities and their correlation with etiologies and surgical procedures. <i>Curr Opin Cardiol<\/i> 2005; 20: 115\u2013121.","DOI":"10.1097\/01.hco.0000153951.31887.a6"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Vianello A, Perlini S, Cappelli S, Palladini G, Epistolato MC, Della Latta D, et al. A multimarker study of degenerative aortic valve disease: Stenoinsufficiency shows more indices of bad prognosis. <i>Cardiology<\/i> 2013; 124: 126\u2013137.","DOI":"10.1159\/000346396"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Catovic S, Popovic ZB, Tasic N, Nezic D, Milojevic P, Djukanovic B, et al. Impact of concomitant aortic regurgitation on long-term outcome after surgical aortic valve replacement in patients with severe aortic stenosis. <i>J Cardiothorac Surg<\/i> 2011; 6: 51\u201357.","DOI":"10.1186\/1749-8090-6-51"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. 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