Text and Data Mining valid from 2019-03-12
Received: 22 October 2018
Accepted: 25 February 2019
First Online: 12 March 2019
Ethics approval and consent to participate
: Due to the retrospective nature of this study, by proxy informed consent for radiological measurements was sought via application for ethical approval with the cantonal ethics committee of the canton Zurich (Kantonale Ethikkommission Zürich).Approval number KEK-ZH-Nr.2011–0507.
: The authors declare that they have no competing interests.
: Not applicable.
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