title: Invited Commentary.
authors.affiliation: Division of Cardiac Surgery, University of Ottawa Heart Institute, 3402-40 Ruskin St, Ottawa, Ontario, Canada, K1Y 4W7.
authors.forename: Hadi D
authors.initials: HD
authors.lastname: Toeg
authors.affiliation: Division of Cardiac Surgery, University of Ottawa Heart Institute, 3402-40 Ruskin St, Ottawa, Ontario, Canada, K1Y 4W7. Electronic address: mruel@ottawaheart.ca.
authors.forename: Marc
authors.initials: M
authors.lastname: Ruel