Özsöyler, Ibrahim, Banu Lafci, Bilgin Emrecan, Mert Kestelli, Sahin Bozok, Cengiz Özbek, Murat Yesil, and Ali Gürbüz. 2006. “Aortic Valve Replacement in True Severe Aortic Stenosis With Low Gradient and Low Ejection Fraction”. The Heart Surgery Forum 9 (4):E681-E685. https://doi.org/10.1532/HSF98.20061039.