- Correspondence to Dr Valentina Isetta, Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona, Casanova 143, Barcelona, 08036, Spain;
- Received March 11, 2015
- Revised July 2, 2015
- Accepted July 28, 2015
- First published August 26, 2015.
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- Data supplement 1 - Online supplement
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