Funding for this research was provided by:
Bettina-Bräu-Stiftung, Fürstenfeldbruck, Germany (-)
Received: 3 May 2019
Accepted: 10 October 2019
First Online: 15 November 2019
Ethics approval and consent to participate
: This non-interventional observation study was performed under the waiver of the Ethics Committee of the Ludwig-Maximilians-University Munich (Re-No. 18–764) and in accordance Helsinki declaration. This is a non-interventional observation study. In accordance with the directive 2001/20/EC of the European Parliament and of the council of 4 April 2001 on the approximation of the laws, regulations and administrative provisions of the member states relating to the implementation of good clinical practice in the conduct of clinical trials on medical products for human use, formal informed consent of the patients and an ethics vote of the institutional ethics committee are not required [CitationRef removed]. Baseline demographics, clinical factors, and survival rates were abstracted from clinical and research records on all patients and maintained on a prospective basis.
: Not applicable.
: The authors declare that they have no competing interests.