Funding for this research was provided by:
Deutsche Krebshilfe (109225)
Received: 20 September 2017
Accepted: 4 April 2018
First Online: 17 April 2018
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the Statutory Physician Board of the State of Rhineland-Palatinate (Reference number 837.161.11, 7703). All the patients accepted to participate in the study and signed a consent form which was attached to the study instrument.
: The authors declare that they have no competing interests.
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