Funding for this research was provided by:
Zentralinstitut f?r die Kassen?rztliche Versorgung in Deutschland
Text and Data Mining valid from 2019-01-10
Accepted: 21 December 2018
First Online: 10 January 2019
Compliance with ethical standards
: This article does not contain any studies with human participants or animals performed by any of the authors.
: The authors declare that they have no conflict of interest.