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PLoS Biology has an Impact Factor of 13.868!

PLoS Biology has received its first Journal Impact Factor, an incredible 13.868, placing it among the most highly cited journals in the health and life sciences.

PLoS Biology placed first in general biology journals and eighth in biochemistry and molecular biology journals, just behind journals such as Annual Review of Biochemistry, Nature Medicine, and Cell. Of the 5,919 journals tracked with Journal Impact Factors, PLoS Biology was 55th, ahead of journals such as Journal of the National Cancer Institute, Annals of Internal Medicine, and Proceedings of the National Academy of Sciences. Journals that ranked higher than PLoS Biology include Nature (32.182), Science (31.853), and JAMA (24.831).

PLoS Biology was launched in October 2003, the first journal in a new open access publishing venture from Public Library of Science, whose offices are in San Francisco. Achieving such a high impact factor is a great accomplishment for a new journal, from a new publisher, with a new business model.

Journal Impact Factors are calculated by Thomson/ISI by counting all 2004 citations to a specific journal that appeared in 2002 and 2003 and then dividing by the number of articles published in that journal during those years. Journal Impact Factors were first developed by the Institute for Scientific Information based on information from the printed Science Citation Index. For more information about Journal Impact Factors, read this essay by Eugene Garfield that was originally published in 1994.

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