Text and Data Mining valid from 2019-10-16
Received: 18 April 2019
Accepted: 5 October 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: The study was carried out according to the Declaration of Helsinki and the Guideline for Good Clinical Practice. The study was approved by the ethics committee of the medical faculty of the Technische Universität München (2410/09). All participants signed an informed consent.
: Not applicable.
: The authors declare that they have no competing interests.