AUTHOR= Frontiers Editorial Office TITLE=Expression of Concern: A new method for ethical and efficient evidence generation for off-label medication use in oncology (a case study in glioblastoma) JOURNAL=Frontiers in Pharmacology VOLUME=14 YEAR=2023 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2023.1264737 DOI=10.3389/fphar.2023.1264737 ISSN=1663-9812