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1 Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
2 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
3 Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
4 Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
1 Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
2 Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
3 Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
4 Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan.
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Comment on
Editorial on the Research Topic The heterogeneity in COPD phenotypes
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