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Zhao, Siya; Lu, Shuya; Wu, Shouyuan; Wang, Zijun; Guo, Qiangqiang; Shi, Qianling; Zhang, Hairong; Zhang, Juanjuan; Liu, Hui; Liu, Yunlan; Zhang, Xianzhuo; Wang, Ling; Ren, Mengjuan; Wang, Ping; Lan, Hui; Zhou, Qi; Sun, Yajia; Cao, Jin; Li, Qinyuan; Estill, Janne; ... (2021). Analysis of COVID-19 Guideline Quality and Change of Recommendations: A Systematic Review. Health data science, 2021, p. 9806173. American Association for the Advancement of Science 10.34133/2021/9806173
