Yasuhiro Matsuda, MD, Masaharu Masuda, MD, PhD *, Takashige Sakio, MD, Mitsutoshi Asai, MD, PhD, Osamu Iida, MD, Shin Okamoto, MD, Takayuki Ishihara, MD, Kiyonori Nanto, MD, Takashi Kanda, MD, Takuya Tsujimura, MD, Yosuke Hata, MD, Hiroyuki Uematsu, MD, and Toshiaki Mano, MD, PhD