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Papadopoulos N, Marinos S, El-Sayed Ahmad A, Keller H, Meybohm P, Zacharowski K, Moritz A, Zierer A.Papadopoulos N, et al. Among authors: keller h.Perfusion. 2015 May;30(4):284-90. doi: 10.1177/0267659114542458. Epub 2014 Jul 21.Perfusion. 2015.PMID: 25049285
Papadopoulos N, Martens S, Keller H, El-Sayed Ahmad A, Moritz A, Zierer A.Papadopoulos N, et al. Among authors: keller h.World J Clin Cases. 2014 Oct 16;2(10):578-80. doi: 10.12998/wjcc.v2.i10.578.World J Clin Cases. 2014.PMID: 25325070Free PMC article.
Abdel-Rahman U, Ozaslan F, Risteski PS, Martens S, Moritz A, Al Daraghmeh A, Keller H, Wimmer-Greinecker G.Abdel-Rahman U, et al. Among authors: keller h.Ann Thorac Surg. 2005 Jul;80(1):238-43. doi: 10.1016/j.athoracsur.2005.02.032.Ann Thorac Surg. 2005.PMID: 15975373Clinical Trial.
Martens S, Dietrich M, Doss M, Deschka M, Keller H, Moritz A.Martens S, et al. Among authors: keller h.Int J Artif Organs. 2006 Jun;29(6):578-82. doi: 10.1177/039139880602900606.Int J Artif Organs. 2006.PMID: 16841286