Funding for this research was provided by:
Narodowe Centrum Badań i Rozwoju (INNOMED/I/7/NCBR/2014)
Received: 31 July 2018
Accepted: 20 December 2018
First Online: 6 February 2019
Ethics approval and consent to participate
: The study was approved by Ethics Review Board of Poznan University of Medical Sciences with decisions no. 21/13 and 75/15. The written, informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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