Impact factor:
2011: 25.421
© Thomson Reuters Journal Citation Reports 2012
Five-Year Impact Factor:
2011: 27.494
To calculate the five year Impact Factor, citations are counted in 2012 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2012, Published by Thomson Reuters.

Imprint: Cell Press

ISSN: 1934-5909

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