ACKNOWLEDGMENTS
ONCOLOGY
This work was supported by the Japanese Radiation Oncology Study Group.We would like to acknowledge the contribution of the late Katsuyuki Karasawa. He substantially contributed to the study conceptualization. We are grateful to Dr. Yukiko Shibata, Dr. Hitoshi Ito and Dr. Izumi Tachibana for their contributions for patient registration to this study. We would also like to take this opportunity to thank Mrs. Maiko Nishihara for her support to revise our protocol.