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Article History

Received: 18 May 2018

Accepted: 27 July 2018

First Online: 31 October 2018

Ethics approval and consent to participate

: Written informed consent for the use of the data for research purposes was obtained and double anonymisation of patients’ data was performed. Ethical committee approval for this retrospective study has been obtained and patients’ informed consent was waived.

: Not applicable.

: The authors declare that they have no competing interests..

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