Received: 21 September 2020
Accepted: 3 December 2020
First Online: 4 January 2021
Ethics approval and consent to participate
: The study considers all ethical requirements necessary in agreement with the national ethical standards and with the 1964 Helsinki declaration and its later amendments. We informed the official Ethics Committee of the Bayerischen Landes̈arztekammer (Chamber of Bavarian Doctors) before the conduction of the survey. Due to the design of the study, the responsibility of the Ethics Committee was not affected. The CT data used were already recorded. We received patients’ consent to perform the tests. No additional examinations were necessary to perform this study.The reliable anonymization of the data before, during, and after the study, was guaranteed throughout.
: The authors declare that they have no competing interests.