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Transcatheter aortic valve implantation in nonagenarians: Selectively feasible or extravagantly futile? <i>Ann Cardiothorac Surg<\/i> 2017; 6: 524\u2013531.","DOI":"10.21037\/acs.2017.07.11"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11. Yokoyama H, Tobaru T, Muto Y, Hagiya K, Higuchi R, Saji M, et al. Long-term outcomes in Japanese nonagenarians undergoing transcatheter aortic valve implantation: A multi-center analysis. <i>Clin Cardiol<\/i> 2019; 42: 605\u2013611.","DOI":"10.1002\/clc.23183"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Kappetein AP, Head SJ, G\u00e9n\u00e9reux P, Piazza N, Mieghem NM, Blackstone EH, et al. Updated standardized endpoint definitions for transcatheter aortic valve implantation: The Valve Academic Research Consortium-2 consensus document. <i>Eur Heart J<\/i> 2012; 33: 2403\u20132418.","DOI":"10.1093\/eurheartj\/ehs255"},{"key":"13","unstructured":"13. Machin D, Cheung YB, Parmar M. Chapter 2: Survival Curves. <i>In<\/i>: Survival Analysis: A Practical Approach, 2<sup>nd<\/sup> edn. Hoboken: Wiley, 2007; 40\u201341."},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Roberts WC, Ko JM, Matter GJ. Aortic valve replacement for aortic stenosis in nonagenarians. <i>Am J Cardiol<\/i> 2006; 98: 1251\u20131253.","DOI":"10.1016\/j.amjcard.2006.05.061"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Edwards MB, Taylor KM. Outcomes in nonagenarians after heart valve replacement operation. <i>Ann Thorac Surg<\/i> 2003; 75: 830\u2013834.","DOI":"10.1016\/S0003-4975(02)04558-7"},{"key":"16","unstructured":"16. Director-General for Statistics and Information Policy. Mortality probability by cause of death. Ministry of Health, Labour and Welfare; 2018. https:\/\/www.mhlw.go.jp\/english\/database\/db-hw\/lifetb18\/dl\/lifetb18-04.pdf (accessed April 26, 2020)."},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Rheude T, Pellegrini C, Michel J, Trenkwalder T, Mayr NP, Kessler T, et al. Prognostic impact of anemia and iron-deficiency anemia in a contemporary cohort of patients undergoing transcatheter aortic valve implantation. <i>Int J Cardiol<\/i> 2017; 244: 93\u201399.","DOI":"10.1016\/j.ijcard.2017.06.024"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Esc\u00e1rcega RO, Lipinski MJ, Magalhaes MA, Baker NC, Minha S, Okubagzi PG, et al. Impact of blood transfusions on short- and long-term mortality in patients who underwent transcatheter aortic valve implantation. <i>Am J Cardiol<\/i> 2015; 115: 93\u201399.","DOI":"10.1016\/j.amjcard.2014.09.046"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. Garg L, Agrawal S, Pew T, Hanzel GS, Abbas AE, Gallagher MJ, et al. 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