Effect of low-dose theophylline on airway inflammation in COPD

Motoko Kobayashi, Yasuyuki Nasuhara, Tomoko Betsuyaku, Eiji Shibuya, Yoshinori Tanino, Mishie Tanino, Kei Takamura, Katsura Nagai, Takeshi Hosokawa, Masaharu Nishimura