“…First, when they applied the Chi-square test and Fisher’s exact test to analyze factors correlated with adverse effects, they did not include the dose of the organ at risk (OAR) such as D2cc or D0.1cc of skin or mucosa. It is well known that the dose of OAR is closely related to the occurrence of radiation damage ( 2 – 4 ). Therefore, we recommend that the authors further analyze the detailed relationship between the dose of OAR and radiation damage.…”