Clinical Outcomes of Proton Beam Therapy for Unresectable Locally Advanced Pancreatic Cancer: A Single-Center Retrospective Study oleh Ichiro Seto, MD, DMD, PhD, Hisashi Yamaguchi, MD, PhD, Yoshiaki Takagawa, MD, PhD, Yusuke Azami, MD, PhD, Kanako Takayama, DMD, PhD, Motohisa Suzuki, MD, PhD, Masanori Machida, MD, Yuntao Dai, MD, PhD, Nor Shazrina Binti Sulaiman, MD, PhD, Yasuhiro Kikuchi, MD, PhD, Takahiro Kato, PhD, Noriyuki Nishino, MD, PhD, Yasushi Teranishi, MD, PhD, Masao Murakami, MD, PhD