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Schmidt A, Keirse K, Blessing E, Langhoff R, Diaz-Cartelle J; European Study Group.Schmidt A, et al.J Cardiovasc Surg (Torino). 2014 Aug;55(4):551-8. Epub 2014 Jun 13.J Cardiovasc Surg (Torino). 2014.PMID: 24926886