Received: 23 March 2018
Accepted: 4 March 2019
First Online: 4 April 2019
Ethics approval and consent to participate
: The local institutional ethics committee of the University of Greifswald approved the study (BB 054/17) and stated that there are no ethical or legal concerns regarding this study. The decision was based on the Helsinki declaration. The need for consent for the retrospective use of patient data was waived by the institutional committee of the University of Greifswald. Written informed consent was obtained for the angiography.
: Informed consent was obtained from the patient whose angiography images and videos are provided.
: The authors declare that they have no competing interests.
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