[1] Korea Univ, Dept Hlth Policy & Management, Room 367,B-Dong Hana Sci Bldg,145 Anam Ro, Seoul, South Korea
[2] Korea Univ, Interdisciplinary Program Precis Publ Hlth, Seoul, South Korea
[3] Korea Inst Hlth & Social Affairs, Sejong, South Korea
[4] Univ Wisconsin Madison, Ctr Demog Hlth & Aging, Madison, WI USA