Ono, Takashi, Tomonori yabuuchi, Tatsuya Nakamura, Kanako Kimura, Yusuke Azami, Katsumi Hirose, Motohisa Suzuki, Hitoshi Wada, Yasuhiro Kikuchi, and Kenji Nemoto. 2017. “High Dose Hypofractionated Proton Beam Therapy Is a Safe and Feasible Treatment for Central Lung Cancer”. Radiology and Oncology 51 (3). https://www.radioloncol.com/index.php/ro/article/view/2771.