Funding for this research was provided by:
Ministerstvo Školství, Mládeže a Tělovýchovy (CZ.2.16/3.1.00/24501, NPU I LO1613)
Article History
Received: 31 January 2019
Accepted: 22 June 2019
First Online: 9 July 2019
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.