Funding for this research was provided by:
Marga und Walter Boll-Stiftung
Text and Data Mining valid from 2019-11-26
Received: 11 January 2019
Accepted: 26 September 2019
First Online: 26 November 2019
Ethics approval and consent to participate
: All patients gave written informed consent before participating in the study. The study was carried out following the ethical principles of the World Medical Association (Declaration of Helsinki) and after obtaining approval by the ethics committee of the Medical Faculty in Cologne (09–137).
: Not applicable.
: Dr. Fink reports personal fees (for speaking engagements) from Bayer, Lilly, Teva, Boehringer Ingelheim, Sanofi, Desitin, and Glaxo Smith Kline, outside the area of the submitted work.Dres. Ant, Niessen, Achilles, Saliger, Karbe and Weiss declare that they have no competing interests.