Reply to Van Hattum's "comment on Costello and Gerber".
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Biomedical subjects
Publications and source records attributed to J M Costello.
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A 9 1/2-year-old boy who had been treated with pyrimethamine and sulphadimidine presented with generalised lymphadenopathy, fever, and an unusual sun-tanning. He was found to have mild anaemia, severe leucopenia and thrombocytopenia. The bone marrow was megaloblastic. Lymph node biopsy was initially interpreted as showing malignant lymphoma. No treatment for neoplasia was given and he was well 4 1/2 years later. We consider that the seemingly malignant changes were due to pyrimethamine.
This report presents a description of the principles of programmed instruction and an explanation of all major components of a program. No attempt is made to review or critique all available speech and language programs, but certain programs are discussed in some detail in order to illustrate adequate application of programming principles.
A phenotypically female child, investigated because of short stature, had abnormally large, often bipartite Barr bodies and a mosaicism of 45, X cells and cells with 46 chromosomes which included an exceptionally large metacentric chromosome (Xp+). G- and C-banding established that the chromosome was derived from two substantially entire X chromosomes joined short arm-to-short arm, and was likely to be an isodicentric X with functional inactivation of one centromere.
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