AUTHOR=Miki Keisuke , Tsujino Kazuyuki , Maekura Ryoji , Matsuki Takanori , Miki Mari , Hashimoto Hisako , Kagawa Hiroyuki , Kawasaki Takahiro , Kuge Tomoki , Kida Hiroshi 

TITLE=Corrigendum: Oxygen Extraction Based on Inspiratory and Expiratory Gas Analysis Identifies Ventilatory Inefficiency in Chronic Obstructive Pulmonary Disease

JOURNAL=Frontiers in Physiology

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2021.770151

DOI=10.3389/fphys.2021.770151

ISSN=1664-042X