Funding for this research was provided by:
Received: 19 November 2019
Accepted: 5 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: The ethics committee of Leuphana University in Lueneburg approved the design of this study (reference number: 201606, EB-Antrag Lehr201606_holidaily). Each participant provided via the survey tool informed consent for participation in the study at the time of enrolment.
: not applicable.
: The authors declare that they have no competing interests. The source of funding played no role in the design of this study and the funding organization will have no say during its execution, analyses, interpretation of data, or decision to submit results.