AUTHOR=Roelen Dave L. , Heidt Sebastiaan TITLE=In Memoriam Frans H. J. Claas JOURNAL=Transplant International VOLUME=Volume 38 - 2025 YEAR=2025 URL=https://www.frontierspartnerships.org/journals/transplant-international/articles/10.3389/ti.2025.14462 DOI=10.3389/ti.2025.14462 ISSN=1432-2277