Funding for this research was provided by:
Universität Hamburg
Article History
Received: 27 January 2020
Accepted: 6 August 2020
First Online: 16 September 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: In accordance with the policies of the Institutional Review Board of Hamburg University no ethics approval was needed for this study. No personal data are processed in this study. The analyses are based exclusively on publicly available data.