Impact of Preexisting Interstitial Lung Disease on Acute, Extensive Radiation Pneumonitis: Retrospective Analysis of Patients with Lung Cancer. oleh Yuichi Ozawa, Takefumi Abe, Minako Omae, Takashi Matsui, Masato Kato, Hirotsugu Hasegawa, Yasunori Enomoto, Takeaki Ishihara, Naoki Inui, Kazunari Yamada, Koshi Yokomura, Takafumi Suda