AUTHOR=Zhou Linlin , Zhang Yinghui , Zhang Jiayu , Wang Hongyu , Zhao Bozhi , Cai Yixin , Qu Yuansong , Li Xinxin , Zhang Dongwei TITLE=Clinical characteristics and therapeutic direction of HER2 low-expression breast cancer JOURNAL=Frontiers in Oncology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2025.1484103 DOI=10.3389/fonc.2025.1484103 ISSN=2234-943X