[1] Ren JL, Zhang AH, Wang XJ. Traditional Chinese medicine for COVID-19 treatment. Pharmacol Res, 2020; 155, 104743. doi:  10.1016/j.phrs.2020.104743
[2] Ma Y, Zhu DS, Chen RB, et al. Association of overlapped and un-overlapped comorbidities with COVID-19 severity and treatment outcomes: a retrospective cohort study from nine provinces in China. Biomed Environ Sci, 2020; 33, 893−905.
[3] Shi NN, Liu B, Liang N, et al. Association between early treatment with Qingfei Paidu decoction and favorable clinical outcomes in patients with COVID-19: a retrospective multicenter cohort study. Pharmacol Res, 2020; 161, 105290. doi:  10.1016/j.phrs.2020.105290
[4] Zhang LH, Zheng X, Bai XK, et al. Association between use of Qingfei Paidu Tang and mortality in hospitalized patients with COVID-19: a national retrospective registry study. Phytomedicine, 2021; 85, 153531. doi:  10.1016/j.phymed.2021.153531
[5] Jang S, Kim D, Yi E, et al. Telemedicine and the use of Korean medicine for patients with COVID-19 in South Korea: observational study. JMIR Public Health Surveill, 2021; 7, e20236. doi:  10.2196/20236
[6] Bastian M, Heymann S, Jacomy M. Gephi: an open source software for exploring and manipulating networks. In: Third International AAAI Conference on Weblogs and Social Media (ICWSM), 2009. https://gephi.org/publications/gephi-bastian-feb09.pdf. [2021-06-28].
[7] Fan YP, Wang YP, Ma Y, et al. Analysis on composition mechanism of Qingfei Paidu decoction from pathogenesis of cold pestilence of COVID-19. Chin J Exp Tradit Med Formul, 2020; 26, 1−5. (In Chinese
[8] Cao P, Wu SL, Wu TT, et al. The important role of polysaccharides from a traditional Chinese medicine-lung cleansing and detoxifying decoction against the COVID-19 pandemic. Carbohydr Polym, 2020; 240, 116346. doi:  10.1016/j.carbpol.2020.116346
[9] Zhao J, Tian SS, Lu D, et al. Systems pharmacological study illustrates the immune regulation, anti-infection, anti-inflammation, and multi-organ protection mechanism of Qing-Fei-Pai-Du decoction in the treatment of COVID-19. Phytomedicine, 2021; 85, 153315. doi:  10.1016/j.phymed.2020.153315
[10] Fu LF, Shao S, Feng Y. Mechanism of microbial metabolite leupeptin in the treatment of COVID-19 by TCM herbs. mBio, 2021; In press
[11] Jiang QQ, Chen XY. Thinking on Qingfei Paidu decoction for quick and effective treatment of novel coronavirus pneumonia based on syndrome differentiation. J Tradit Chin Med, 2020; 61, 1204−6. (In Chinese