Text and Data Mining valid from 2018-04-25
Received: 27 November 2017
Accepted: 2 April 2018
First Online: 25 April 2018
Ethics approval and consent to participate
: We performed a retrospective analysis of completely anonymized data. According to the German Guidelines for Secondary Data Analysis, ethical approval and consent to participate is not required for this type of study.
: The authors declare that they have fully acknowledged any competing financial or personal interests with regard to this research project. LS, SW, and MP do not have any conflicting interests related directly or indirectly to the project. JW reports personal fees from Boehringer Ingelheim and Roche outside the submitted work. MK acknowledges grants and personal fees from Boehringer Ingelheim and Roche outside the submitted work.
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