The discovery of the first drug effective in treating acute lymphoid leukemia in children.
D002648:Child; D005493:Folic Acid Antagonists / Q000627:therapeutic use; D006801:Humans; D007239:Infections / Q000139:chemically induced; D007945:Leukemia, Lymphoid / Q000188:drug therapy*; D007970:Leukopenia / Q000139:chemically induced; D009151:Mustard Gas / Q000506:poisoning; D012106:Research
D005493:Folic Acid Antagonists; D009151:Mustard Gas