%0 Journal Article %T Policy during coronavirus disease 2019 (COVID-19) pandemic: a protector for acute exacerbation of COPD (AECOPD) patients? %A Zeng, Yuqin %A Zhou, Zijing %A Chen, Ping %J Journal of Thoracic Disease %D 2021 %B 2021 %9 %! Policy during coronavirus disease 2019 (COVID-19) pandemic: a protector for acute exacerbation of COPD (AECOPD) patients? %K %X %U https://jtd.amegroups.org/article/view/50864 %V 13 %N 5 %P 3188-3190 %@ 2077-6624