Funding for this research was provided by:
Fundacja na rzecz Nauki Polskiej (POMOST 2012-6/2)
Received: 10 May 2018
Revised: 16 July 2018
Accepted: 23 August 2018
First Online: 21 September 2018
: The study protocol and all procedures were reviewed and approved by the Local Ethics Animal Welfare Commission (Medical University of Warsaw, permission number 39/2012).
: Not applicable.
: AB, BD are co-inventors of “Endoscope needle guide for injections at an angle into the walls of tubular organs to the predetermined depth and apparatus for injections at an angle”. The patent holder is the Medical University of Warsaw; Number: EP16155346.6. WZW, AK, MB, RZ, AGJ, PR, ZG and LP declare no conflict of interest.
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