[1] CANC & LEUKEMIA GRP B OPERAT OFF,SCARSDALE,NY
[2] W VIRGINIA UNIV,MED CTR,DEPT PEDIAT,MORGANTOWN,WV 26506
[3] RHODE ISL HOSP,DEPT PEDIAT,PROVIDENCE,RI 02902
[4] RHODE ISL HOSP,DEPT RADIAT ONCOL,PROVIDENCE,RI 02902
[5] INST RECH LEUCEMIES,DEPT PEDIAT,PARIS,FRANCE
[6] SWISS COOPERAT GRP,DIV ONCOL,ZURICH,SWITZERLAND
[7] UNIV MIAMI,MED CTR,DEPT PEDIAT,MIAMI,FL 33152
[8] MAYO CLIN & MAYO FDN,DEPT PEDIAT,ROCHESTER,MN 55901
[9] NEW ENGLAND MED CTR,DEPT PEDIAT,BOSTON,MA 02111
[10] MT SINAI HOSP & MED CTR,DEPT PEDIAT,NEW YORK,NY 10029
[11] MT SINAI HOSP & MED CTR,DEPT NEOPLAST DIS,NEW YORK,NY 10029
[12] UNIV CALIF SAN DIEGO,MED CTR,DEPT PEDIAT,SAN DIEGO,CA 92103
[13] WAKE FOREST UNIV,BOWMAN GRAY SCH MED,DEPT PEDIAT,WINSTON SALEM,NC 27103
[14] VIRGINIA COMMONWEALTH UNIV,MED COLL VIRGINIA,DEPT PEDIAT,RICHMOND,VA 23298
[15] MONTREAL CHILDRENS HOSP,DEPT PEDIAT,MONTREAL H3H 1P3,QUEBEC,CANADA