[\'Hunan University of Chinese Medicine, China.\', \'Hunan Provincial Key Laboratory of Diagnostics in Chinese Medicine, Hunan University of Chinese Medicine, Xueshi Road, Yuelu District, Changsha, Hunan, China.\']
Clinical efficacy and safety of Qingshu Yiqi decoction as a complementary and alternative therapy for COVID-19 with Delta variant: A protocol for systematic review and meta-analysis.