Stereotactic body radiotherapy for lung tumors: Preliminary results from a single institution - Eisaku YODEN; Kei KONISHI; Nobuhiko KAMITANI; Ryoji TOKIYA; Junichi HIRATSUKA; Masao NAKATA; Mikio OKA; Naomi NAGASE; Koki KAKUBA; Tadashi TANI; Makiko HIGUCHI (KAWASAKI MEDICAL JOURNAL (Japanese), 2012)