- Correspondence to Dr P Knaapen, VU University Medical Center, Department of Cardiology, De Boelelaan 1117, P.O. Box 7057, Amsterdam 1081 HV, the Netherlands;
- Received July 27, 2015
- Revised November 12, 2015
- Accepted December 25, 2015
- First published February 3, 2016.
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