Acute Cholecystitis and Cholelithiasis Developed after Esophagectomy oleh Mitsuo Tachibana, Shoichi Kinugasa, Hiroshi Yoshimura, Dipok Kumar Dhar, Shuhei Ueda, Toshiyuki Fujii, Takeru Nakamoto, Ioannis Kyriazanos, Naofumi Nagasue