1. Department of Somnology, Tokyo Medical University
2. Paramount Bed Sleep Research Laboratory, PARAMOUNT BED CO., LTD.
3. Neuropsychiatric Research Institute, Japan Somnology Center
4. Foundation of Sleep and Health Science
5. Department of clinical inspection, Tokyo Dental College Ichikawa General Hospital
6. Department of Otorhinolaryngology, Tokyo Dental College Ichikawa General Hospital