four criteria for the risk grouping of children 's acute lymphoblastic leukemia : children 's cancer and leukemia study group ( cclsg ) in japan , southwest oncology group ( swog ) and children 's cancer study group ( ccg-141 ) in the usa , berlin-frankfurt-munster study group ( bfm ) in west germany , were applied retrospectively to 109 patients with the disease who had been treated randomly in sapporo national hospital from 1978 to 1986 .
C0023449
acute lymphoblastic leukemia
C0023418
study