Funding for this research was provided by:
Ministry of Social Affairs and Integration Baden-Wurttemberg (-)
Text and Data Mining valid from 2019-12-01
Received: 18 December 2018
Accepted: 28 November 2019
First Online: 19 December 2019
Ethics approval and consent to participate
: Information of the Ethics Committee of the Medical Faculty Heidelberg over the necessity of an ethics committee approval was obtained. The Committee stated that approval is not necessary due to the use of pseudonymous data only.
: Not applicable.
: The authors declare that they have no competing interests.