Efficacy of acupuncture as an adjunctive treatment to patients with stable COPD: a multicenter, randomized, sham-controlled trial protocol.

"Declarations Ethics approval and consent to participateThis trial will be conducted under the requirements of the Declaration of Helsinki. The entire project has been approved by the Ethics Committee of the Hospital of Chengdu University of Traditional Chinese Medicine (ID: 2022KL-021) and registered in the Chinese Clinical Trials Registry (No. ChiCTR2200058757). Before randomization, patients are required to sign an informed consent form. Subjects' personal information is confidential, and participation in the study is entirely voluntary, with the right to withdraw at any time during any study phase. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This study was supported by the Innovation Team and Talents Cultivation Program of the National Administration of Traditional Chinese Medicine supported this study. (No: ZYYCXTD-D-202003). The funding agency was not involved in the study design, data collection, data analysis, data interpretation, report writing, or submission of the report as an article for publication."

"Trial registration This study was registered in the Chinese Clinical Trial Registry (ChiCTR2200058757), on April 16, 2022."