AUTHOR=Montay-Gruel Pierre , Vozenin Marie-Catherine , Limoli Charles L. TITLE=Letter in Response to Doyen et al., “Early Toxicities After High Dose Rate Proton Therapy in Cancer Treatments” JOURNAL=Frontiers in Oncology VOLUME=11 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.687593 DOI=10.3389/fonc.2021.687593 ISSN=2234-943X