title: Reply.
authors.affiliation: Robert Bosch Hospital, Cardiovascular Surgery and Adult Cardiac Surgery, Auerbachstr. 110, Stuttgart, 70376 Germany. Electronic address: christian.rustenbach@rbk.de.
authors.forename: Christian Jörg
authors.initials: CJ
authors.lastname: Rustenbach
authors.affiliation: Robert Bosch Hospital, Cardiovascular Surgery and Adult Cardiac Surgery, Auerbachstr. 110, Stuttgart, 70376 Germany.
authors.forename: Kristina
authors.initials: K
authors.lastname: Wachter
authors.affiliation: Robert Bosch Hospital, Cardiovascular Surgery and Adult Cardiac Surgery, Auerbachstr. 110, Stuttgart, 70376 Germany.
authors.forename: Hardy
authors.initials: H
authors.lastname: Baumbach