1. Young Duck Shin:
Department of Anesthesiology & Pain Medicine, College of Medicine, Chungbuk National University, Korea
2. Sang Hi Park:
Department of Anesthesiology & Pain Medicine, Chungbuk National University Hospital, Sunhwan-ro, Seowon-Gu, Cheongju, Chungbuk, Korea
3. Hyeon Tae Kim:
Department of Anesthesiology & Pain Medicine, Chungbuk National University Hospital, Korea
4. Chan Jin Park:
Department of Anesthesiology & Pain Medicine, Chungbuk National University Hospital, Korea
5. Jin Hee Lee:
Department of Anesthesiology & Pain Medicine, Chungbuk National University Hospital, Korea
6. Young Jin Choi:
Department of Anesthesiology & Pain Medicine, Chungbuk National University Hospital, Korea