1. Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
2. Department of Anesthesiology and Pain Medicine, CHA Bundang Medical Center, CHA University, Seongnam 13496, Republic of Korea
3. Department of Research Affairs, Biostatistics Collaboration Unit, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
4. Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Republic of Korea