Funding for this research was provided by:
German Medical Association
Bavarian Chamber of Doctors
Munich Center of Health Sciences
Text and Data Mining valid from 2018-08-14
Received: 5 April 2018
Accepted: 11 July 2018
First Online: 14 August 2018
Ethics approval and consent to participate
: The study was approved by the Committee on Ethics of Human Research of the Medical Faculty, Ludwig-Maximilians University Munich (No. 016/04), and participants signed a letter of informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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