AUTHOR=Xu Yingxue , Li Yi , Zhang Yong , Li Guisen TITLE=Urine complement analysis implies complement activation is involved in membranous nephropathy JOURNAL=Frontiers in Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2025.1515928 DOI=10.3389/fmed.2025.1515928 ISSN=2296-858X