Assessing the Outcomes of Coronary Artery Bypass Graft Surgery: How Many Risk Factors Are Enough? fn1fn1Dr. Naylor is supported by a Career Scientist Award from the Ontario Ministry of Health, Toronto, Ontario, Canada. This work was supported by an operating grant from the Sunnybrook Trust for Medical Research, North York, Ontario, Canada.fn2fn2To discuss this article on-line, visit the ACC Home page at www.acc.org/membersand click on the JACC Forum