AUTHOR=Wen Yi , Zhao Gengmin , Dai Chunhua TITLE=Cell-free DNA: plays an essential role in early diagnosis and immunotherapy of pancreatic cancer JOURNAL=Frontiers in Immunology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1546332 DOI=10.3389/fimmu.2025.1546332 ISSN=1664-3224