Efficacy and safety of Bufei Huoxue capsules in the management of convalescent patients with COVID-19 infection: A multicentre, double-blind, and randomised controlled trial.

"Conflicts of interest The authors have declared no conflicts of interest. Guangdong Leiyunshang Pharmaceutical Co., Ltd. provided the medications for the study. However, they did not participate in research design, data collection, data analysis, data interpretation, or manuscript writing."

"Funding This study was financially supported by grants from the Guangzhou Institute of Respiratory Health for Key Research of Independent Project (Grant No. ZNSA-2020013); Guangdong-Hong Kong-Macao Joint Laboratory for respiratory infectious desease independent project (Grant No. GHMJLRID-Z-202110) and Guangdong Lei Yun Shang Pharmaceutical Co., Ltd., who were not involved in the study, including the planning, execution, data management, statistical analysis, evaluation, or write-up."

"Written informed consent was obtained from all study participants. This study was registered with the China Clinical Trial Registration Centre (registration number: ChiCTR2000032573)."