Świtaj, Piotr
Grygiel, Paweł
Chrostek, Anna
Nowak, Izabela
Wciórka, Jacek
Anczewska, Marta
Article History
Accepted: 14 May 2017
First Online: 22 May 2017
Compliance with ethical standards
:
: The authors 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.
: Informed consent was obtained from all individual participants included in the study.