Funding for this research was provided by:
Narodowe Centrum Badań i Rozwoju (Pol-Nor/196829/87/2013)
Norwegian Financial Mechanism (Pol-Nor/196829/87/2013)
Article History
Received: 9 June 2019
Revised: 18 October 2019
Accepted: 23 October 2019
First Online: 31 October 2019
Compliance with ethical standards
:
: The authors declare no competing interests.