Erratum
After publication of our recent Poster presentation [1], we noticed that C. Delierneux, A. Hego, J Huart, A Joly, P Geurts, P Damas, C Lecut, A Gothot and C Oury had been inadvertently omitted as co-authors. The author list is now complete and the competing interests section modified accordingly.
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Competing interests
The authors declare that they have no competing interests.