Funding for this research was provided by:
Ministerstwo Nauki i Szkolnictwa Wyższego (DI2013006643)
European Commission (STREAM 692190)
Received: 18 January 2017
Accepted: 12 February 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: There was no research involving human or animal subjects in the study.
: Not applicable.
: The authors declare that they have no competing interest.
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