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Previous Volume 347:1211-1212 October 10, 2002 Number 15 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: The United States leads all other countries in productivity with respect to medical research.^1,2,3 However, the relative contributions of countries to research are changing over time.

We examined different countries' shares of basic-science and clinical articles in 13 journals. On the basis of categories established by the Institute for Scientific Information⁴ and journal impact factors, we selected six basic-science journals (Cell, Nature, Nature Genetics, Nature Medicine, Neuron, and Science) and seven clinical journals (the American Journal of Medicine, the Annals of Internal Medicine, the Archives of Internal Medicine, the British Medical Journal, the Journal of . . . [Full Text of this Article]

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