AUTHOR=Liu Jianguo , Song Wengang , Tang Hua TITLE=Advances and challenges in identifying precursors of memory CD4+ T cells JOURNAL=Frontiers in Immunology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1540045 DOI=10.3389/fimmu.2025.1540045 ISSN=1664-3224