Hirochika Makino , Chikara Kunisaki , Hirotoshi Akiyama , Hidetaka A Ono , Takashi Kosaka , Ryo Takagawa , Yasuhiko Nagano , Syoichi Fujii and Hiroshi Shimada
Patient Safety in Surgery 2008, 2:7doi:10.1186/1754-9493-2-7