Daum, Thomas http://orcid.org/0000-0001-7575-1763
Birner, Regina
Funding for this research was provided by:
Bundesministerium für Wirtschaftliche Zusammenarbeit und Entwicklung
Universität Hohenheim
Article History
Received: 27 October 2020
Accepted: 10 November 2021
First Online: 23 November 2021
Declarations
:
: The study was conducted according to the guidelines laid down in the Declaration of Helsinki and approved by the Ethics committee of the University of Hohenheim. All study participants gave their written consent to participate in the study. For study participants below the age of 18, consent was obtained from themselves and their parents or guardians.
: The authors declared that they have no conflict of interest.