Acute necrotic disorder of the small intestine post‐coronavirus disease‐2019 vaccination oleh Tomoyuki Nishimura, Seiji Onogawa, Takuya Yamamoto, Yasuhiro Okuda, Morito Ikeda, Nozomu Matsumoto, Keisuke Kurihara, Akinori Shimizu, Shosuke Kitamura, Yoshio Katamura, Naomichi Hirano, Shingo Itamoto, Masahiro Nakahara, Shuji Yonehara, Fumio Shimamoto, Keiji Hanada