Text and Data Mining valid from 2020-03-30
Received: 3 February 2020
Accepted: 3 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: The research has been performed according to the Declaration of Helsinki and has been approved by the ethic committee of the “Ärztekammer Westfalen-Lippe and Westfalian Wilhelm University of Münster” (AZ 2019–496-f-S). As the videos were analysed retrospectively after being anonymized, the ethics committee waived the requirement for informed consent of individual patients.
: Not applicable.
: The authors declare that they have no competing interests.