1. Department of Diagnostic and Therapeutic Sciences , Division of Dental Anesthesiology, Meikai University School of Dentistry , Sakado , Japan
2. Center for Sensory-Motor Interaction (SMI) , Department of Health Science & Technology, Faculty of Medicine, Aalborg University , Aalborg , Denmark
3. Department of Health Science and Technology, Center for Neuroplasticity and Pain , SMI, School of Medicine, Aalborg University , Aalborg , Denmark
4. Department of Medical Gastroenterology , Mech-Sense, Aalborg University Hospital , Aalborg , Denmark