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Article History

Received: 11 October 2018

Accepted: 24 January 2019

First Online: 7 February 2019

Ethics approval and consent to participate

: Written informed consent for proton/carbon treatment and repeated MR imaging for positioning control as an individual treatment approach was obtained from all patients.

: Written informed consent for permission to publish treatment related data in an anonymized way was obtained from all patients.

: The authors declare that they have no competing interests.

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