[1] GEORGE WASHINGTON UNIV,SCH MED,DEPT SURG,WASHINGTON,DC
[2] UNIV CALIF,MED SCH,DIV ONCOL,LOS ANGELES,CA 90024
[3] LOUISIANA STATE UNIV,MED CTR,DEPT MED,SECT CARDIOL,NEW ORLEANS,CA
[4] NHLI,CARDIOL BRANCH,BETHESDA,MD 20014
[5] NCI,SURG BRANCH,BETHESDA,MD 20014
[6] UNIV CALIF,SCH MED,DIV THORAC SURG,LOS ANGELES,CA 90024