Text and Data Mining valid from 2018-07-25
Received: 17 March 2018
Accepted: 4 July 2018
First Online: 25 July 2018
Conflict of interest
: P. Rogowski, S. Schönecker, M. Pazos, D. Reitz, M. Braun, M. Pölcher, C. Hanusch, R. Wuerstlein, N. Harbeck, S. Mahner, C. Belka, and S. Corradini declare that they have no competing interests.