Received: 18 March 2019
Accepted: 9 October 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: The study was approved by the local ethics committee of the Hannover Medical University under the Number EA_2017_2569.Informed consent was obtained from all participants before study participation.
: We have written consent from all healthy subjects to publish the data.We have written consent from all 4 patients to publish the data in an anonymized form (as it has been done).The Videos have been anonymized. Both, the subject and the patient gave consent to having the videos and data published.Besides the two videos, our manuscript does not contain any individual person’s data.We have written consent from all authors to publish the manuscript in the present form. All authors read and approved the manuscript.
: The authors declare that they have no competing interests.