1. College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea.
2. Department of Health Service Management, Daejeon University, Daejeon, Republic of Korea.
3. KM Fundamental Research Division, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea.
4. Department of Statistics, Daejeon University, Daejeon, Republic of Korea.
5. Mibyeong Research Center, Korea Institute of Oriental Medicine, Daejeon, Republic of Korea.