Funding for this research was provided by:
Grantová Agentura České Republiky (16-09659S)
Ministerstvo Školství, Mládeže a Tělovýchovy (RVO 67985939)
Article History
Received: 18 August 2017
Accepted: 11 April 2018
First Online: 25 April 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.