Received: 11 February 2020
Accepted: 27 July 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: The study protocol has been approved by Independent Bioethics Committee for Scientific Research at Medical University of Gdańsk, Poland (the project indentification code: 422/2016).The participants will be informed about this study, potential benefits and risks. The consent agreement received from patients will be necessary to include them to the trial.
: Not applicable.
: The company Sanprobi IBS® provided probiotics and placebo. They did not participate in study design or writing this study protocol. KSŻ received remuneration from Sanprobi; however, it has no relation with this article.