Support for this project was provided by the Defense Advanced Research Projects Agency under Contract No. MDA972-00-1-0005, the National Science Foundation under Contract No. DBI-0094528, the Department of Health and Human Services/National Institutes of Health (including the National Institute of General Medical Sciences and the National Center for Research Resources) under Contract No. N01-OD-4-2139, the Department of Energy under Contract No. DE-FG02-02ER63336, the Department of Energy’s Office of Science (BER) under Interagency Agreement No. DE-FG02-04ER63934, and National Research Council funds. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the organizations or agencies that provided support for the project.
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 Sciences, 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.