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Korea Institute for Health and Social Affairs, 2021-07-23, Research in Brief, no. 80, pp. 1 - 12
한국보건사회연구원, 2021-09-30, 보건사회연구 제41권 제3호, pp.298-317
2021-10-27, European Journal of Population, vol. 37, no. 4-5, pp. 997 - 1022