title: Invited Commentary.
authors.affiliation: Department of Surgery, University of Toronto, Medical Sciences Bldg, Rm 7256, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8. Electronic address: c.wittnich@utoronto.ca.
authors.forename: Carin
authors.initials: C
authors.lastname: Wittnich
mesh_terms: D000046:Academic Medical Centers / Q000706:statistics & numerical data*; D005260:Female; D006330:Heart Defects, Congenital / Q000601:surgery*; D016027:Heart Transplantation; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000453:epidemiology*; D013038:Specialization; D066231:Surgeons / Q000592:standards*