- Correspondence to Dr Amin Polzin, Division of Cardiology, Pulmonology and Vascular Medicine, Heinrich Heine University Medical Center Düsseldorf, Moorenstrasse 5, Düsseldorf 40225, Germany;
- Received June 2, 2015
- Revised August 25, 2015
- Accepted September 15, 2015
- First published October 7, 2015.
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