Invited commentary.
Higgins
Thomas L
TL
Critical Care Services, Baystate Medical Center, Springfield, MA 01199, USA. thomas.higgins@bhs.org
D019918:Heart Valve Prosthesis Implantation / Q000401:mortality*; D006801:Humans; D008962:Models, Theoretical; D011379:Prognosis; D011787:Quality of Health Care; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D016019:Survival Analysis