Text and Data Mining valid from 2019-02-25
First Online: 25 February 2019
Compliance with Ethical Standards
: No external funding was used in the preparation of this manuscript.
: Jens U. Marquardt has received honoraria from Bayer, Roche and Pfizer. Arndt Vogel has received honoraria from Bayer, Roche, Lilly, EISAI, Ipsen, BMS, and MSD. Anna Saborowski and Carolin Czauderna declare that they have no conflicts of interest that might be relevant to the contents of this manuscript.