AUTHOR=He Zemin , Liu Keting , Wu Ling , Wei Qiang , Shen Qingwei TITLE=Analysis of screen-detected pulmonary nodules before and after the novel coronavirus epidemic: a multicenter retrospective cohort study JOURNAL=Frontiers in Oncology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2025.1534074 DOI=10.3389/fonc.2025.1534074 ISSN=2234-943X