- Correspondence to Dr Martin J Schalij, Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands, P.O. Box 9600, Leiden 2300 RC, The Netherlands;
- Received March 21, 2013
- Accepted May 7, 2013
- First published May 30, 2013.
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