[1] TUFTS UNIV,NEW ENGLAND MED CTR,DEPT OBSTET & GYNECOL,BOSTON,MA 02111
[2] TUFTS UNIV,SCH MED,DEPT OBSTET & GYNECOL,BOSTON,MA 02111
[3] TUFTS UNIV,SCH MED,DEPT RADIOL,BOSTON,MA 02111
[4] NEW ENGLAND MED CTR HOSP,BOSTON,MA 02111
[5] ST MARGARETS HOSP,DEPT RADIOL,BOSTON,MA