Nihon University Graduate School of Dentistry at Matsudo, Oral Function and Rehabilitation, Matsudo, Chiba 271– 8587, Japan

Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan

Departments of Neurosurgery/Head and Neck Surgery, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan

Faculty of Law, Seiwa University, Kisarazu, Chiba 292 – 8555, Japan

Departments of Internal Medicine, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan

Departments of Neurosurgery/Head and Neck Surgery, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan

Sleep Research Group, Charles Perkins Centre, University of Sydney, Sydney 2006, Australia
Sydney School of Health Sciences, Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia

Division of Oral Function and Rehabilitation, Department of Oral Health Science, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271 – 8587, Japan