[1] BETH ISRAEL HOSP, DEPT PATHOL, BOSTON, MA 02215 USA
[2] NEW ENGLAND DEACONESS HOSP, DEPT PATHOL, BOSTON, MA 02215 USA
[3] BRIGHAM & WOMENS HOSP, DEPT PATHOL, BOSTON, MA 02115 USA
[4] HARVARD UNIV, SCH MED, JOINT CTR RADIAT THERAPY, DEPT PATHOL, BOSTON, MA 02115 USA