Text and Data Mining valid from 2018-04-12
Received: 28 November 2017
Accepted: 2 April 2018
First Online: 12 April 2018
Ethics approval and consent to participate
: All procedures performed 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 need for a formal review of this retrospective study was waived by the Ethical Committee of the University of Rostock (file no. A 2017-0197). All patients gave their written consent after being informed about possible side effects and risks of the therapy.
: The authors declare that they have no competing interests.
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