Gaszynski, Tomasz
Article History
Received: 18 December 2019
Accepted: 23 March 2020
First Online: 2 April 2020
Compliance with ethical standards
:
: All authors declares that they have no conflict of interest.
: Ethical approval was obtained for this study from Medical University of Lodz Ethics Comittee (RNN/331/15/KE). All study procedures were performed inaccordance with ethical standards of this institutional research comittee and with 1964 Helsinki declaration and its later amendments.