1. Department of Anesthesiology and Pain Medicine, Graduate School of Medicine Juntendo University Tokyo Japan
2. Addictive Substance Project Tokyo Metropolitan Institute of Medical Science Tokyo Japan
3. Department of Oral Health and Clinical Science Tokyo Dental College Tokyo Japan
4. Department of Dental Anesthesiology Tokyo Dental College Tokyo Japan
5. Department of Anesthesiology Saitama Medical University Hospital Saitama Japan
6. Department of Anesthesiology Saitama Medical University International Medical Center Saitama Japan