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Article History

Received: 4 May 2019

Revised: 19 June 2019

Accepted: 21 June 2019

First Online: 29 June 2019

Compliance with ethical standards

:

: PI has received research grants from Novartis and Bayer; GS has received a speaker honorarium from Bayer; MA declares that she has no conflict of interest.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the swissethics committee in Berne (ID 2016-00650) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

: Due to the retrospective study design, and because several patients had already died at the start of the study, informed consent could not be obtained in all cases. Thus, the ethics committee allowed the use of anonymized data without obtaining prior informed consent for this study.