This study was supported by the U.S. Department of Energy under grant number DE-FG02-08ER15932; the National Institutes of Health under contract number N01-OD-4-2139, TO #200; and the National Science Foundation under grant number CHE-0740356. Additional support was received from Air Products and Chemicals, Inc.; the American Chemical Society; E. I. du Pont de Nemours and Company; Eastman Chemical Company; the Howard Hughes Medical Institute; and PPG Industries.
Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors 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.