AUTHOR=Chen Gang , Yu Yang , Qi Youchao , Li Guangxu , Li Ning , Meng Fande TITLE=Comparative analysis of PD-L1 expression and molecular alterations in primary versus metastatic lung adenocarcinoma: a real-world study in China JOURNAL=Frontiers in Oncology VOLUME=14 YEAR=2024 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2024.1393686 DOI=10.3389/fonc.2024.1393686 ISSN=2234-943X