[1] CHILDRENS HOSP MED CTR, SURG RES LAB, 300 LONGWOOD AVE, BOSTON, MA 02115 USA
[2] CHILDRENS HOSP MED CTR, DEPT SURG, BOSTON, MA 02115 USA
[3] HARVARD UNIV, SCH MED, DEPT ANAT, BOSTON, MA 02115 USA
[4] HARVARD UNIV, SCH MED, DEPT PATHOL, BOSTON, MA 02115 USA
[5] KABIVITRUM AB, RES & DEV CARDIOVASC, S-11287 STOCKHOLM, SWEDEN