Funding for this research was provided by:
Univerzita Karlova v Praze (PROGRESS Q37)
Received: 26 October 2019
Accepted: 13 April 2020
First Online: 24 April 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards and with 1964 Helsinki declaration and its later amendments or comparable ethical standards.