1. Head of Department Medical record service team, National Health Insurance Service Ilsan, Hospital, 100, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, Republic of Korea. E-mail: shindonggy@gmail.com
2. *2Department of Health Promotion, Ministry of Public Health Yaounde, Cameroon; 3Institute for Occupational and Environmental Science, Korea University, Seoul, Korea E-mail: ttandi2002@yahoo.com
3. 4Department of Health Management, Jeonju University 303 Cheonjam-ro, Wansan-gu, Jeonju-si, 55069, Republic of Korea E-mail : seasea12@jj.ar.kr