1. Seoul National University Hospital, Korea (H-S.K., J.K., D.H., J-K.H., H-M.Y., H-J.K., B-K.K., K.W.P.).
2. Seoul Medical Center, Korea (S.Y.K.).
3. Chosun University Hospital, Gwangju, Korea (K-H.P.).
4. Korea University Guro Hospital, Seoul, Korea (S-W.R.).
5. Soon Chun Hyang University Cheonan Hospital, Cheonan, Korea (W-Y.S.).
6. Ajou University School of Medicine, Suwon, Korea (H-S.L.).
7. Dong-A University Hospital, Busan, Korea (K.P.).