- Correspondence to Professor Hans-Peter Hammes, 5th Medical Department, Universitätsmedizin Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, Mannheim 68167, Germany;
- Received August 30, 2016
- Revised January 31, 2017
- Accepted February 20, 2017
- First published March 17, 2017.
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