AUTHOR=Skvortsova Ira Ida , Span Paul N. TITLE=Editorial: Advances in Biological Understanding of Tumor Radiation Resistance JOURNAL=Frontiers in Oncology VOLUME=10 YEAR=2020 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2020.00754 DOI=10.3389/fonc.2020.00754 ISSN=2234-943X