AUTHOR=Liu Yilin , Luo Qin , Li Junqi , Yang Chunyan , Huang Fengyuan , Xu Guixing , Liang Fanrong TITLE=Acupuncture improves the symptoms, gut microbiota, metabolomics, and inflammation of patients with chronic obstructive pulmonary disease: a multicenter, randomized, sham-controlled trial protocol JOURNAL=Frontiers in Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2025.1511275 DOI=10.3389/fmed.2025.1511275 ISSN=2296-858X