[1] CORNELL UNIV, MED CTR, COLL MED, DEPT MED, DIV HEMATOL ONCOL, NEW YORK, NY 10021 USA
[2] CORNELL UNIV, MED CTR, COLL MED, SPECIALIZED CTR THROMBOSIS RES, NEW YORK, NY 10021 USA
[3] UNIV TEXAS, HLTH SCI CTR, DEPT MOLEC GENET, DALLAS, TX 75235 USA
[4] UNIV MUNICH, MED KLIN INNENSTADT, D-8000 MUNICH 2, FED REP GER