Funding for this research was provided by:
Ministerstvo Zdravotnictví Ceské Republiky (15-31426A, 00064203)
Received: 25 March 2021
Accepted: 22 June 2021
First Online: 12 August 2021
: The studies were approved by local ethics committees or review boards of the authors' institutions (ref. numbers FNM-AZV 26.8.2014, 37231669, 425423-2014), and all subjects or their guardians explicitly expressed their consent to participate.
: Not applicable.
: The authors declare they have no competing interests.