Funding for this research was provided by:
Horizon 2020 Framework Programme (644906)
Received: 12 December 2019
Accepted: 3 December 2020
First Online: 11 December 2020
Ethics approval and consent to participate
: The University hospital of Heraklion (PAGNI) ethics committee approved the study and waived signed informed consent due to the absence of an intervention.
: Not applicable.
: All authors have disclosed that they have no financial or ethical conflicts of interest.