title: Reply.
authors.affiliation: Department of Cardiothoracic Surgery, Bd571, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands.
authors.forename: Aart
authors.initials: A
authors.lastname: Mookhoek
authors.affiliation: Department of Cardiothoracic Surgery, Bd571, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands. Electronic address: j.j.m.takkenberg@erasmusmc.nl.
authors.forename: Johanna J M
authors.initials: JJ
authors.lastname: Takkenberg
authors.affiliation: Department of Cardiothoracic Surgery, Bd571, Erasmus University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands.
authors.forename: Ad J J C
authors.initials: AJ
authors.lastname: Bogers