1. Konyang University hospital, Daejeon, Korea, Republic of
2. Dankook University Hospital, Cheonan, Korea, Republic of
3. Keimyung University (KMU), Daegu, Daegu, Korea, Republic of
4. Jeonbuk National University, Jeonju, Korea, Republic of
5. Yeungnam University, Daegu, Korea, Republic of
6. Kosin University Gospel Hospital, Busan, Korea, Republic of
7. Seoul National University, Seoul, Korea, Republic of