Funding for this research was provided by:
Horizon 2020 Framework Programme (813707, 813707)
Received: 12 April 2021
Accepted: 9 September 2021
First Online: 18 September 2021
: Ethical approval was not required for this study, because it did not involve human participants and data was publicly available.
: Not applicable.
: The authors declare that they have no competing interests.