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 Board responsible for the report were chosen for their special competences and with regard for appropriate balance.

Support for the National Cancer Policy Board is provided by the National Cancer Institute; the Centers for Disease Control and Prevention; Abbott Laboratories; the American Cancer Society; American Society of Clinical Oncology; Amgen, Inc.; Aventis; and United Health Care Foundation. The views presented in this report are those of the Institute of Medicine and the Division of Earth and Life Studies National Cancer Policy Board and are not necessarily those of the funding agencies.

Library of Congress Control Number: 2001094187

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