Jürgens, Norbert
Oncken, Imke
Oldeland, Jens
Gunter, Felicitas
Rudolph, Barbara
Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (FKZ 01LG1201M/1201N)
Projekt DEAL
Article History
Received: 6 August 2020
Accepted: 24 December 2020
First Online: 27 January 2021
Competing interests
: The authors declare no competing interests.