Long- versus short-duration systemic corticosteroid regimens for acute exacerbations of COPD: A systematic review and meta-analysis of randomized trials and cohort studies. - Zhao, Zhen; Lou, Owen; Wang, Yiyang; Yin, Raymond; Gong, Carrie; Deng, Florence; Wu, Ethan C.; Xie, Jing Yi; Wu, Jerry; Ma, Avery; Guo, Yongzhi; Xiong, Wei Ting (PLoS ONE, 2023)