Pepke, W.
Almansour, H.
Diebo, B. G.
Akbar, M.
Article History
First Online: 10 September 2019
Compliance with ethical guidelines
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: W. Pepke, H. Almansour, B.G. Diebo and M. Akbar declare that they have no competing interests.
: The ethics committee of the medical faculty of Heidelberg University approved this study. Vote no. S‑378/2016. Radiographs of the study cohort were conducted routinely, i.e. no additional radiographs were performed in the context of this study. These radiographs were retrospectively analyzed. Hence, no informed consent was required to perform this study.