By A Committee Of The Institute Of Medicine, Division Of Health Care Services ; Patrick H. Mattingly And Kathleen N. Lohr, Editors. Supported By The Health Care Financing Administration, U.s. Dept. Of Health And Human Services, Under Basic Ordering Agreement Contract No. 500-89-0008--t.p. Verso. S250--t.p. Verso. Includes Bibliographical References (p. 45-48).