AUTHOR=Tanabe Naoya , Rhee Chin Kook , Park Hye Yun , Suzuki Masaru TITLE=Editorial: The heterogeneity in COPD phenotypes JOURNAL=Frontiers in Medicine VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2022.982121 DOI=10.3389/fmed.2022.982121 ISSN=2296-858X