Funding for this research was provided by:
Carl von Ossietzky Universität Oldenburg
Received: 6 July 2021
Accepted: 4 March 2022
First Online: 15 March 2022
: This study only used publicly available data. No original data were collected. Ethical approval for each of the studies included in the investigation can be found in the original publications. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.