Funding for this research was provided by:
Received: 9 February 2020
Accepted: 27 April 2020
First Online: 11 May 2020
Ethics approval and consent to participate
: Study was submitted and additionally approved by our institutional ethics committee - Ethics Committee for Research of the University of Hradec Kralove. Informed written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no conflict of interest.