Text and Data Mining valid from 2018-09-24
Received: 18 July 2018
Accepted: 12 September 2018
First Online: 24 September 2018
Compliance with ethical standards
: The authors declare that they have no competing interests.
: Not applicable.
: Informed written consent was obtained from the patient at the time of the endoscopic procedure.
: All data generated or analyzed during this study are included in this published article (Additional file 1).