Funding for this research was provided by:
Ministerstvo Školství, Mládeže a Tělovýchovy (CZ.02.1.01/0.0/0.0/16_019/0000798)
Received: 1 December 2020
Accepted: 4 January 2021
First Online: 12 January 2021
Ethics approval and consent to participate
: Study participants completed a written informed consent. The study procedures were approved by the Ethics Comittee of the Unversity of Ostrava, Czech Republic.
: Not applicable.
: The authors declare that they have no competing interests.