Analysis and prediction of immune cell infiltration characteristics in COPD: Folium isatidis and its active ingredients are able to combat lung lesions caused by COPD by correcting immune cell infiltration - Wang, Faqin; Zhang, Weichen; Huang, Yujie; Hou, Xianbang; He, Liwei; Xu, Huiqin (Frontiers in Medicine, 2025)