[1] CHILDRENS HOSP MED CTR, DIV HEMATOL & ONCOL, BOSTON, MA 02115 USA
[2] HARVARD UNIV, SCH MED, SIDNEY FARBER CANC INST, DEPT PEDIAT, BOSTON, MA 02115 USA
[3] BOSTON UNIV, MED CTR, DEPT SURG, BOSTON, MA 02118 USA
[4] BOSTON UNIV, SCH MED, BOSTON, MA 02118 USA
[5] CUNY MT SINAI SCH MED, POLLY ANNENBERG LEVEE HEMATOL CTR, DEPT PEDIAT, NEW YORK, NY 10029 USA
[6] VET ADM HOSP, MED CTR, BOSTON, MA 02130 USA