Funding for this research was provided by:
Bavarian State Ministry of Public Health and Care Services
Text and Data Mining valid from 2019-09-17
Received: 14 May 2019
Accepted: 3 September 2019
First Online: 17 September 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Ethical approval was provided by the Ludwig-Maximilians-University, Munich, Germany. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent: Informed consent was obtained from all individual participants included in the study.