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BioMed Central journals receive higher impact factor ratings -

Open access (OA) publisher BioMed Central, US has announced that 40 of its journals have received official impact factors. Thomson Reuters recently released the 2007 Journal Citation Report.

Highlights of this year's Impact Factors include an impressive showing by BMC Biology, the biological flagship journal of the BMC series, which debuted with an Impact Factor above 5.0; ,i>Molecular Pain, which performed well in the Anesthesiology category, and Pain Medicine with an Impact Factor of 4.13.

Malaria Journal retained its status as the No 1. ranked journal in the field of Tropical Medicine, while Retrovirology appeared for the first time in the JCR, ranking 5th of 25 journals in the Virology category, ahead of long established titles such as the journal Virology. BMC Plant Biology jumped straight into the upper echelons of the Plant Science rankings, with an Impact Factor of 3.23, which places it 18th of 152 journals in that area.

Overall, the median Impact Factor of a BioMed Central journal has increased from 2.77 to 2.91. Last year, BioMed Central had four journals with Impact Factors above 4.0 and 10 journals with Impact Factors above 3.0. This year, there are 8 journals above 4.0, and 17 greater than 3.0. In addition to the 40 journals listed above, many more BioMed Central journals are already tracked by Thomson Reuters and are due to receive official Impact Factors within a year or two.

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