Niikura R, Nagata N, Yamano K, Shimbo T, Uemura N. Case Rep Gastrointest Med. 2013;2013:365954. doi: 10.1155/2013/365954. Epub 2013 May 9.
Department of Gastroenterology and Hepatology, National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku, Tokyo 162-8655, Japan.

