?:authorAffiliation
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[\'Department of Economics, Hongik University, Wausanro 94, Mapo-gu, Seoul 04066, South Korea. Electronic address: y.j.kim@hongik.ac.kr.\', \'Department of Economics, Seoul National University, Gwanak Ro 1, Gwanak Gu, Seoul 08826, South Korea. Electronic address: myunghseo@snu.ac.kr.\', \'Department of Nursing, Chungnam National University, Munhwaro 266, Jung-gu, Daejeon 35075, South Korea. Electronic address: yeom@cnu.ac.kr.\']
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