Changes to This Summary (12/14/2011)
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.
Added Baertschiger et al. as reference 9 and level of evidence 3iiA.
Added Guiteau et al. and Malek et al. as references 14 and 15, respectively.
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