Funding for this research was provided by:
Text and Data Mining valid from 2018-04-10
Received: 23 February 2018
Accepted: 23 March 2018
First Online: 10 April 2018
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was approved by the ethical committee of the University of Heidelberg and the Federal Agency of Radiation Protection.
: All patients included gave written informed consent that their data could be used for scientific purposes.
: The authors declare that they have no competing interests
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