THE NATIONAL ACADEMIES PRESS
500 Fifth Street, N.W. Washington, DC 20001

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.

This study was supported by Agreement No. SA6646 between the National Academy of Sciences and the University of California. 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.

This report was prepared as a result of work sponsored through the University of California by the California Department of Food and Agriculture Agreement Number 02-0376. It does not necessarily represent the views of the Agency, its employees or the State of California. Neither the Agency, nor any of its employees, contractors or subcontractors, nor the Regents of the University of California:

(A) Make any warranty or representation whatsoever regarding the report, express or implied, with respect to the merchantability or fitness for any particular purpose of the report, or freedom from contamination by computer viruses with respect to the report, or

(B) Assumes any liability whatsoever, direct or indirect with respect to any use of the report or any portion thereof, or for the accuracy or validity of the information contained in the report.

The National Academy of Sciences is an Equal Opportunity service provider.

International Standard Book Number 0-309-09289-2 (Book)

International Standard Book Number 0-309-54493-9 (PDF)

Library of Congress Control Number 2004114396

Additional copies of this report are available from the
National Academies Press,
500 Fifth Street, N.W., Lockbox 285, Washington, DC 20055; (800) 624-6242 or (202) 334-3313 (in the Washington metropolitan area); Internet, http://www.nap.edu

Copyright 2004 by the National Academy of Sciences. All rights reserved.

Printed in the United States of America



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement