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NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Science, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.

Support for this project was provided by the National Science Foundation (Award No. DMI-0222041), the Robert Wood Johnson Foundation (Grant No. 044640), and the National Institutes of Health (Contract No. N01-OD-4-2139, Task Order No. 111). Any opinions, findings, and conclusions or recommendations expressed in this report are those of the National Academy of Engineering/Institute of Medicine Committee on Engineering and the Health Care System and do not necessarily reflect the views of the funding organizations, nor does mention of trade names, commercial products, or organizations imply endorsement by the U.S. government.

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