- Correspondence to Dr Charles Peterfy, Spire Sciences, Inc., 5314 Boca Marina Cir N, Boca Raton, FL 33487-5221, USA;
- Received July 16, 2015
- Revised November 30, 2015
- Accepted January 16, 2016
- First published February 10, 2016.
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- Data supplement 1 - Online supplement
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