A Case of Perforated Sigmoid Diverticulitis in Which Gram Staining of Ascitic Fluid Was Useful for Diagnosis oleh Junko Tsuchida, Shouhei Fujita, Fumihiro Kawano, Ryoichi Tsukamoto, Kunpei Honjo, Shigetoshi Naito, Shun Ishiyama, Shozo Miyano, Michio Machida, Toshiaki Kitabatake, Minoru Fujisawa, Kuniaki Kojima, Kanako Ogura, Toshiharu Matsumoto