Text and Data Mining valid from 2020-03-04
Received: 26 March 2019
Accepted: 27 February 2020
First Online: 4 March 2020
Ethics approval and consent to participate
: The study was conducted with the approval of the local ethics committee of the University of Applied Sciences Gera Germany (project number: 112010301) and registered in the German Register of Clinical Trials with the ID: DRKS00014090 (a registry that is a main registry of the WHO International Clinical Trials Registration Platform (ICTRP)).
: Standardized data were evaluated anonymously.
: The authors declare that they have no competing interests.