[1] Univ Tokyo, Sch Publ Hlth, Dept Hlth Econ & Epidemiol Res, Bunkyo Ku, Tokyo 1310033, Japan
[2] Univ Tokyo, Dept Global Hlth Policy, Tokyo 1310033, Japan
[3] Univ Tokyo, Dept Hlth Management & Policy, Tokyo 1310033, Japan
[4] Univ Tokyo, Dept Healthcare Qual Assessment, Tokyo 1310033, Japan
[5] Keio Univ, Dept Hlth Policy & Management, Tokyo, Japan
[6] Natl Inst Populat & Social Secur Res, Tokyo, Japan
[7] De la SalleHlth Sci Inst, Dasmarinas City, Philippines
[8] Harvard Univ, Sch Publ Hlth, Dept Global Hlth & Populat, Boston, MA 02115 USA