- Correspondence to Dr Olaf Ahlers, Department of Anaesthesiology and Intensive Care Medicine, Charité – Universitätsmedizin Berlin, Campus Virchow-Klinikum and Campus Charité Mitte, Augustenburger Platz 1, 13353 Berlin, Germany;
- Accepted July 10, 2010
- First published September 15, 2010.
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