title: Invited Commentary.
authors.affiliation: Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, Ontario, Canada K1Y 4W7.
authors.forename: Donna May
authors.initials: DM
authors.lastname: Kimmaliardjuk
authors.affiliation: Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, Ontario, Canada K1Y 4W7.
authors.forename: Vincent
authors.initials: V
authors.lastname: Chan
authors.affiliation: Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin St, Ottawa, Ontario, Canada K1Y 4W7. Electronic address: mruel@ottawaheart.ca.
authors.forename: Marc
authors.initials: M
authors.lastname: Ruel