Funding for this research was provided by:
Deutsche Krebshilfe (70-2892-BR I, 108419 and 108253, 110826 and 110828)
Text and Data Mining valid from 2019-11-07
Received: 21 February 2019
Accepted: 27 September 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: These studies were approved by the ethical committees of the University of Heidelberg, the Medical Board of the State of Rhineland-Palatinate, and the ethical review board of Hamburg Medical Council and were conducted in accordance with the Declaration of Helsinki. All study participants provided informed written consent.
: Not applicable.
: The authors declare that they have no competing interests.