[1] PETER BENT BRIGHAM HOSP, DEPT PATHOL, BOSTON, MA 02115 USA
[2] HARVARD UNIV, BOSTON CITY HOSP, THORNDIKE MEM LAB, MED UNIT, BOSTON, MA 02118 USA
[3] ROBERT BRECK BRIGHAM HOSP, DEPT MED, BOSTON, MA 02120 USA
[4] HARVARD UNIV, MED SCH, CAMBRIDGE, MA 02138 USA
[5] PETER BENT BRIGHAM HOSP, DEPT MED, BOSTON, MA 02115 USA