1. Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
2. Eulji University Hospital, College of Medicine, Seoul, Republic of Korea
3. Ulsan Medical Center, Ulsan Hospital, Ulsan, Republic of Korea
4. Korea University Anam Hospital, Seoul, Republic of Korea
5. NHIS Ilsan Hospital, Goyang, Republic of Korea
6. Kangwon National University School of Medicine, Chuncheon, Republic of Korea
7. Chung-Ang University Hospital, Seoul, Republic of Korea
8. Chonbuk National University, School of Medicine, Jeonju, Republic of Korea
9. Chungbuk National University, School of Medicine, Cheongju, Republic of Korea
10. Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Republic of Korea
11. Inje University Ilsan Paik Hospital, Goyang, Republic of Korea
12. Inje University Sanggye Paik Hospital, Seoul, Republic of Korea