¶ Laura MacDanald, aged 20 months, left hospital in Darby, Pa. in good condition after a unique operation to combat the ravages of acute leukemia, which threatened her with early death. Laura is one of identical twins. When her disease became resistant to drug treatment, doctors gave her a massive dose of whole-body X rays to destroy bone marrow that was making abnormal blood cells, then took 40 cc. of marrow fluid (containing an estimated 2 billion healthy cells) from twin Mary, injected the material into Laura's bloodstream. Though pleased that Laura's blood returned to near normal and she soon showed...
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