1 Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine, Edobashi 2-174, Tsu, Mie, 514-8507, Japan, yasuda19792@yahoo.co.jp.
Erratum to: Clin J Gastroenterol (2015) 8:10–13,DOI 10.1007/s12328-014-0540-0. The name of the third author should be given as Hiroki Imaoka, not Yuhki Imaoka.