1.   And some surgeons are now doing bypass surgery without stopping the heart in a procedure that may result in less damage to the brain.

2.   Air Force surgeons have done four more since then.

3.   But the University of Pennsylvania surgeon did the operation without a colostomy.

4.   Dr. Swain said that although academic surgeons cannot do the controlled double-blind trials so common to drug research, they do try to assess experimental operations.

5.   Even so, some men around the country still want the procedure, and Rosenstein and a few other surgeons are doing a brisk business.

6.   For example, they found that Massachusetts surgeons tended to perform implants in patients who were less disabled by their hip arthritis than did surgeons in Canada.

7.   Heart surgeons can do miraculous things.

8.   How can surgeons do delicate stitching while the heart still beats?

9.   Is it easier for the surgeon to do?

10.   One reason is the widely accepted belief that the more often a surgeon does a procedure, the better the performance.