- Correspondence to Dr Benjamin Ewert, Klinik für Palliativmedizin, Universitätsklinikum Bonn, Sigmund-Freud-Str. 25, Bonn 53127, Germany;
- Received January 5, 2015
- Revision received July 23, 2015
- Accepted October 7, 2015
- First published December 8, 2015.
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