"This study was supported by Contract No. HHSM-500-2004-00010C between the National Academy of Sciences and the United States Department of Health and Human Services through the Centers for Medicare and Medicaid Services"--T.p. verso
Includes bibliographical references and index
Electronic reproduction. Ann Arbor, MI : ProQuest, 2015. Available via World Wide Web. Access may be limited to ProQuest affiliated libraries