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Article History

Received: 5 June 2018

Accepted: 19 November 2018

First Online: 7 December 2018

Ethics approval and consent to participate

: The study protocol was approved by the Ethics Committee of the Medical Faculty of the University of Heidelberg and conducted in accordance with the Declaration of Helsinki. Participating in the research meant giving informed consent from both patients and caregivers that the data could be used anonymously for research purposes.

: Not applicable.

: On behalf of all authors, the corresponding author states that they have no competing interests.

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