The Harvard study involved only men who were about 20 years younger.
But most, like the Harvard study of 89,000 nurses, found no relationship.
The group's first effort was a $140,000 grant that paid for the Harvard study.
But he said the large size of the Harvard study made it "hard to argue with."
The survey was not an official Harvard study, the researchers said.
Surprisingly his Harvard study has made him feel less pressed to move into the world outside performance.
A similar effect was also found in men being followed in another Harvard study.
A new Harvard study shows that public schools are highly segregated, and becoming more so.
The secret was in the packaging, the 1991 Harvard study hinted.
The Harvard study also showed an increased risk of death among heart attack patients older than 75 who received clot-busting drugs.