- Correspondence to Dr Emma Svennberg, Department of Clinical Sciences, Cardiology Unit, Karolinska Institutet, Danderyd University Hospital, Hjärtkliniken plan 2, hus 18, Stockholm, SE-182 88, Sweden;
- Received June 28, 2016
- Revised December 29, 2016
- Accepted January 29, 2017
- First published March 2, 2017.
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