Funding for this research was provided by:
Ministerstvo Školství, Mládeže a Tělovýchovy (LD15035)
Article History
Received: 2 November 2017
Accepted: 3 January 2018
First Online: 3 February 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants performed by any of the authors.