Expert Consensus on Clinical Practice of Burn Units in Shanghai During the COVID-19 Epidemic. Issue 4 (4th August 2021) - Ma, Bing; Fan, Xiaoming; Kong, Weishi; Xiao, Shichu; Zhu, Shihui; Yao, Min; Liu, Yan; Zhu, Weiping; Wang, Jie; Zeng, Yong; Zhao, Yede; Su, Bo; et al.