title: Invited commentary.
authors.affiliation: Department of Cardiothoracic Surgery, Great Ormond Street Hospital for Children NHS Trust, and Clinical Operational Research Unit, University College London, Great Ormond St, London WC1N 3JH, United Kingdom. tsangv@gosh.nhs.uk
authors.forename: Victor
authors.initials: V
authors.lastname: Tsang
authors.forename: Martin
authors.initials: M
authors.lastname: Utley
mesh_terms: D006348:Cardiac Surgical Procedures; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D018570:Risk Assessment / Q000379:methods*