Funding for this research was provided by:
Narodowe Centrum Nauki (2013/09/B/NZ4/03258, 2015/19/N/NZ2/02915)
Article History
Received: 27 July 2018
Accepted: 30 August 2018
First Online: 10 September 2018
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.