Ryou IS, Kim JY, Park HY, Han J, Pak Y, Lee HY, Baek HJ, Lee JY, Chang SH, Lee JH, Choe JS.  A Qualitative Study on Utilization and Unmet Needs of Healthcare Service for Overseas Koreans in Vietnam.  KJFP 2018;8:585-592.  https://doi.org/10.21215/kjfp.2018.8.4.585