title: In Regard to Nagata et al.
authors.affiliation: Department of Radiation Oncology, Hiroshima University, Hiroshima, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nagata
authors.affiliation: Japan Clinical Oncology Group Data Center, Center for Research Administration and Support, National Cancer Center, Tokyo, Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Shibata
authors.affiliation: Department of Radiology, Koshigaya Municipal Hospital, Koshigaya, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ishikura