Baricitinib treatment for hospitalized patients with severe COVID-19 on invasive mechanical ventilation: a propensity score-matched and retrospective analysis - Mao, Yanxiong; Guo, Anyi; Zhang, Ying; Lai, Jianxing; Yuan, Dian; Zhang, Hao; Diao, Wenqi; Chen, Weisong; Yan, Fugui (Frontiers in Medicine, 2025)