title: Reply to Collins and Altman.
authors.forename: Linda D
authors.initials: LD
authors.lastname: Sharples
authors.forename: Samer A M
authors.initials: SA
authors.lastname: Nashef
mesh_terms: D006348:Cardiac Surgical Procedures / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D012720:Severity of Illness Index