Article History
Received: 9 February 2021
Accepted: 11 August 2021
First Online: 18 August 2021
Declarations
:
: This study was reviewed and approved by the Ethics Committee of the Centre of Gerontology in Prague the Czech Republic following the declaration of Helsinki principles.
: Not applicable.
: Petr Fiala, Iva Holmerova, Tomas Ruda, and Michal Steffl declare that they have no competing interests relevant to the content of this paper.