Descripció
Descripció de l’ítem:"This study was supported by the Health Care Financing Administration, U.S. Department of Health and Human Services, under cooperative agreement no. 17-C-99170/3"--Title page verso
Descripció física:1 online resource (468 pages) : illustrations
Bibliografia:Includes bibliographical references and indexes.
ISBN:0585339759
9780585339757
0309042305