- Correspondence to Dr Marc A Sintek, Cardiovascular Division, Washington University School of Medicine, Campus Box 8086, 660 S. Euclid Avenue, St. Louis, MO 63110,USA;
- Received September 2, 2015
- Revised November 5, 2015
- Accepted November 18, 2015
- First published December 30, 2015.
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- Data supplement 1 - Online supplement
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