Funding for this research was provided by:
Agency for Healthcare Research, Czech Republic (NV16-31207A)
Received: 24 January 2018
Accepted: 7 May 2018
First Online: 14 May 2018
Ethics approval and consent to participate
: Informed consent was gained from all participants or their legal representatives and formal approval for the study was granted by the Ethics Committee of the Faculty of Medicine, University of Ostrava.
: All the individuals had signed consent forms for participating in this research project and use the obtained data in relevant publications.
: The authors declare that they have no competing interests.
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