Received: 7 January 2020
Accepted: 13 February 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: The study was approved by the local ethics committee, and the need for informed consent was waived (ethics committee of the State Chamber of Physicians of Baden-Wuerttemberg, Germany, file number F-2018-116).
: Not applicable.
: CN has received honoraria for lectures and served on advisory boards for Boehringer, Ingelheim, and Roche. AG, JP, AS, AC, and SW have disclosed that they do not have any conflicts of interest.