Efficacy and safety of the Qiguiyin formula in severe pneumonia: study protocol for a randomized, double-blind, placebo-controlled clinical trial

Huang Po, Guo Yuhong, Zhao Jingxia, Li Bo, Wu Yanqing, Liu Qingquan

Journal of Traditional Chinese Medicine . 2020, (2): 317 -323 . DOI: 10.19852/j.cnki.jtcm.2020.02.016