[1] PETER BENT BRIGHAM HOSP,DEPT MED,BOSTON,MA 02115
[2] BOSTON COLL,DEPT MED,CHESTNUT HILL,MA 02167
[3] BOSTON COLL,DEPT OBSTET & GYNECOL,CHESTNUT HILL,MA 02167
[4] HARVARD UNIV,SCH MED,BOSTON,MA 02115
[5] HARVARD UNIV,SCH PUBL HLTH,DEPT EPIDEMIOL,BOSTON,MA 02115