Article History
Received: 18 July 2018
Accepted: 1 January 2019
First Online: 18 January 2019
Compliance with ethical standards
:
: Kryspin Mitura, Karolina Garnysz and Irmina Michałek declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.