Błaszczyński, Paweł http://orcid.org/0000-0003-0843-9061
Article History
Received: 13 December 2017
Accepted: 16 June 2018
First Online: 2 July 2018
Compliance with ethical standards
:
: The author declares that he has 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.
: Informed consent was obtained from all individual participants included in the study.