Suzuki, Shuji
Kondo, Hiroshi
Furukawa, Akira
Kawai, Kentaro
Yukaya, Takafumi
Shimazui, Takashi
Tani, Masaji
Yamamoto, Masakazu
Article History
First Online: 13 July 2020
Compilance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: This study was approved by the research Ethics Committee of Ibaraki Medical Center, Tokyo Medical University (acceptance number: 15–9) and the research Ethics Committee of Japanese Society for Abdominal Emergency Medicine. All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration. This article does not contain any studies with animals performed by any of the authors.
: The requirement for obtaining written informed consent from each patient was waived because of the retrospective study design.