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Functional mitral regurgitation: A link to pulmonary hypertension in heart failure with preserved ejection fraction. <i>J Card Fail<\/i> 2011; 17: 806\u2013812.","DOI":"10.1016\/j.cardfail.2011.05.013"},{"key":"43","doi-asserted-by":"crossref","unstructured":"43. Marechaux S, Terrade J, Biausque F, Lefetz Y, Deturck R, Asseman P, et al. 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