1. Department of Cell Science, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
2. Department of Thoracic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
3. Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Japan
4. IBD Hospital, Sapporo, Japan
5. Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan
6. Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
7. Department of Molecular Medicine, Research Institute for Frontier Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
8. Department of Anatomy, Sapporo Medical University School of Medicine, Sapporo, Japan