Erratum: "High 18F-fluorodeoxyglucose uptake in positron emission tomography-computed tomography is associated with emphysema progression" Kensuke Fukuda, Hirotaka Matsuzaki, Yukihiro Nomura, Takuya Kawahara, Takahiro Nakao, Toshihiro Yamaguchi, Shouhei Hanaoka, Akira Saito, Nobutake Yamamichi, Hidenori Kage and Takeharu Yoshikawa. ERJ