1. Department of Otorhinolaryngology, Head and Neck Surgery; Graduate School of Medicine; Yamanashi University; Yamanashi Japan
2. Department of Otolaryngology, Head and Neck Surgery; Graduate School of Medicine; Chiba University; Chiba Japan
3. Torii; Tokyo Japan
4. ALK; Hørsholm Denmark
5. Association of Pollen Information of Japan; Tokyo Japan
6. Department of Otolaryngology, Head and Neck Surgery; Graduate School of Medicine; Nippon Medical School; Tokyo Japan