AUTHOR=Kardol-Hoefnagel Tineke , Luijk Bart , Reteig Leon , Haitjema Saskia , Leavis Helen L. , Otten Henny G. TITLE=Clara cell 16 kDa protein: an important marker for COVID-19 severity JOURNAL=Frontiers in Immunology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1527377 DOI=10.3389/fimmu.2025.1527377 ISSN=1664-3224