National Research Council ; Aron, Laudan Y. ; Institute of Medicine ; Woolf, Steven H. ; Institute of Medicine (U.S.) ; Laudan Aron ; National Academies (U.S.) ; Steven H. Woolf ; Aron, Laudan ; Board on Population Health and Public Health Practice ; Committee on Population ; Division of Behavioral and Social Sciences and Education ; Panel on Understanding Cross-National Health Differences Among High-Income Countries