Funding for this research was provided by:
Bayerisches Staatsministerium für Gesundheit und Pflege
Text and Data Mining valid from 2019-08-22
Received: 7 June 2019
Accepted: 14 August 2019
First Online: 22 August 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The study protocol was approved by the local ethics committee of the University of Erlangen-Nürnberg (No. 122_17B) in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Informed written consent was obtained from each participant prior to inclusion.