1. Department of Anesthesiology and Pain Medicine, Chungnam National University Hospital, Daejeon 35015, Republic of Korea
2. Department of Anesthesiology and Pain Medicine, College of Medicine, Chungnam National University, Daejeon 34134, Republic of Korea
3. Big Data Center, Biomedical Research Institute, Chungnam National University Hospital, Daejeon 35015, Republic of Korea