[1] CHILDRENS HOSP MED CTR, DEPT RADIAT THERAPY, BOSTON, MA 02115 USA
[2] HARVARD UNIV, SCH MED, DEPT RADIAT THERAPY, BOSTON, MA 02115 USA
[3] HARVARD UNIV, SCH MED, DEPT PEDIAT, BOSTON, MA 02115 USA
[4] HARVARD UNIV, SCH MED, DEPT SURG, BOSTON, MA 02115 USA
[5] JOINT CTR RADIAT THERAPY, BOSTON, MA USA
[6] CHILDRENS HOSP MED CTR, DEPT MED, DIV IMMUNOL, BOSTON, MA 02115 USA
[7] CHILDRENS HOSP MED CTR, DEPT SURG, BOSTON, MA 02115 USA
[8] CHILDRENS HOSP MED CTR, DEPT MED, DIV HEMATOL ONCOL, BOSTON, MA 02115 USA
[9] AMER UNIV BEIRUT, DEPT PEDIAT, BEIRUT, LEBANON