1. Department of Anesthesiology and Pain Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institute, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
4. Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, Korea.