[\'College of Acupuncture and Massage, Shandong University of Traditional Chinese Medicine, Jinan, China.\', \'First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China.\']
Assessment of the effects of Liuzijue Qigong on the lung function of COVID-19 patients during disease recovery: A protocol for systematic review and meta-analysis.