Text and Data Mining valid from 2020-03-17
Received: 10 November 2019
Accepted: 13 January 2020
First Online: 17 March 2020
Ethics approval and consent to participate
: Informed consent had been obtained from all individual participants included in the study. The institutional ethics committee of the University Heart and Vascular Center Hamburg approved the study.
: Not applicable.
: The authors declare that they have no competing interests.