Effects of exercise-based pulmonary rehabilitation on severe/very severe COPD: a systematic review and meta-analysis.

"The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article."

"Funding: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Supported by the National Natural Science Foundation of China (No.81830116, 82004500), the National Key Research and Development Program of China (2018YFC1704806), the Characteristic and Backbone Discipline Construction Project of Henan Province-Traditional Chinese Medicine (No.STG-ZYXKY-2020006), the Chief Scientist of Qihuang Project (No.[2020]219), the Innovation Team and Talents Cultivation Program of National Administration of Traditional Chinese Medicine (No: ZYYCXTD-C-202206), and the Scientific and Technological Project of Science and Technology Department of Henan Province (212102311128)."

"The method of this review strictly followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. The protocol for this review has been registered in the International Prospective Register of Systematic Reviews (PROSPERO) and the registry number is CRD42022294085. Registration:: This systematic review and meta-analysis protocol was prospectively registered with PROSPERO (No. CRD42022294085)."