Funding for this research was provided by:
Horizon 2020 Framework Programme (857088)
Article History
Received: 30 May 2020
Revised: 4 September 2020
Accepted: 5 September 2020
First Online: 21 January 2021
Compliance with ethical standards
:
: The scientific output expressed here are those of the authors and does not imply a policy position of the European Commission or the International Telecommunication Union and their Member States. Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use which might be made of this study.