[1] MASSACHUSETTS GEN HOSP, DEPT RADIOL, BOSTON, MA 02114 USA
[2] MASSACHUSETTS GEN HOSP, CELLULAR & MOLEC BIOL LAB,CARDIAC UNIT, BOSTON, MA 02114 USA
[3] MASSACHUSETTS GEN HOSP, DEPT PATHOL, BOSTON, MA 02114 USA
[4] MASSACHUSETTS GEN HOSP, DEPT SURG, BOSTON, MA 02114 USA