1. Division of Physiology, School of Nursing and Rehabilitation Sciences, Showa University, Yokohama 226-8555, Japan
2. Department of Otolaryngology and Laryngological Oncology, Medical University of Lublin, Lublin 20-090, Poland
3. Department of Otolaryngology, School of Medicine, Kyung Hee University, Seoul 100-101, Republic of Korea
4. Department of Respiratory Diseases, Research Institute, National Center for Global Health and Medicine, Tokyo 162-0052, Japan