Risk factors of cervical surgery related complications in patients older than 80 years oleh Koji Tamai, Hidetomi Terai, Akinobu Suzuki, Hiroaki Nakamura, Masaomi Yamashita, Yawara Eguchi, Shiro Imagama, Kei Ando, Kazuyoshi Kobayashi, Morio Matsumoto, Ken Ishii, Tomohiro Hikata, Shoji Seki, Masaaki Aramomi, Tetsuhiro Ishikawa, Atsushi Kimura, Hirokazu Inoue, Gen Inoue, Masayuki Miyagi, Wataru Saito, Kei Yamada, Michio Hongo, Kenji Endo, Hidekazu Suzuki, Atsushi Nakano, Kazuyuki Watanabe, Junichi Ohya, Hirotaka Chikuda, Yasuchika Aoki, Masayuki Shimizu, Toshimasa Futatsugi, Keijiro Mukaiyama, Masaichi Hasegawa, Katsuhito Kiyasu, Haku Iizuka, Kotaro Nishida, Kenichiro Kakutani, Hideaki Nakajima, Hideki Murakami, Satoru Demura, Satoshi Kato, Katsuhito Yoshioka, Takashi Namikawa, Kei Watanabe, Kazuyoshi Nakanishi, Yukihiro Nakagawa, Mitsunori Yoshimoto, Hiroyasu Fujiwara, Norihiro Nishida, Masataka Sakane, Masashi Yamazaki, Takashi Kaito, Takeo Furuya, Sumihisa Orita, Seiji Ohtori