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Article History

Received: 19 April 2018

Accepted: 7 August 2018

First Online: 22 September 2018

Ethics approval and consent to participate

: The study was approved by the Ethics Committee of the Hamburg Chamber of Physicians, Germany, Reference: PV5178, March 1, 2016. Written informed consent was obtained from the patient or a legal guardian.

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: The authors declare that they have no competing interests.

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