Analysis of pathological changes in the epithelium in COVID-19 patient airways - Wenguang Yin; Weitao Cao; Guangde Zhou; Lifei Wang; Jing Sun; Airu Zhu; Zhongfang Wang; Yumin Zhou; Xiaoqing Liu; Yimin Li; Nanshan Zhong; Jincun Zhao; et al. (ERJ Open Research, 2021)