Elevated MUC1 and MUC5AC mucin protein levels in airway mucus of critical ill COVID‐19 patients. Issue 2 (16th September 2020) - Lu, Wenju; Liu, Xiaoqing; Wang, Tao; Liu, Fei; Zhu, Airu; Lin, Yongping; Luo, Jieping; Ye, Feng; He, Jianxing; Zhao, Jincun; Li, Yiming; Zhong, Nanshan