This author has not been identified. Look up 'Junyoung Ko' in GoogleThis author has not been identified. Look up 'Younghwi Yang' in GoogleThis author has not been identified. Look up 'Jisu Kim' in GoogleThis author has not been identified. Look up 'Cheon An Lee' in GoogleThis author has not been identified. Look up 'Young-Sun Min' in GoogleThis author has not been identified. Look up 'Jin-Young Chun' in GoogleThis author has not been identified. Look up 'Moosung Kim' in GoogleThis author has not been identified. Look up 'Seong-Ook Jung' in Google