A novel pathophysiologic link between upper and lower airways in patients with chronic rhinosinusitis: Association of sputum periostin levels with upper airway inflammation and olfactory function

Yoshihiro Kanemitsu, Motohiko Suzuki, Kensuke Fukumitsu, Takamitsu Asano, Norihisa Takeda, Yoshihisa Nakamura, Yoshiyuki Ozawa, Ayako Masaki, Junya Ono, Ryota Kurokawa, Jennifer Yap, Hirono Nishiyama, Satoshi Fukuda, Hirotsugu Ohkubo, Ken Maeno, Yutaka Ito, Tetsuya Oguri, Kenji Izuhara, Masaya Takemura, Akio Niimi