Funding text :
The authors would like to acknowledge Dr. Alex Rieger and Dr. Ivan Pavic for their valuable feedback on the first draft of this paper.
This work has been supported by the Kopernikus-project “SynErgie” by the German Federal Ministry of Education and Research (BMBF), by the Luxembourg National Research Fund (FNR) and PayPal, PEARL grant reference 13342933/Gilbert Fridgen. The authors would like to express their gratitude for the project supervision by the project management organization Projektträger Jülich (PtJ). For the purpose of open access, and in fulfillment of the obligations arising from the grant agreement, the author has applied a Creative Commons Attribution 4.0 International (CC BY 4.0) license to any Author Accepted Manuscript version arising from this submission.
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