There was an error published in Biol. Open4, 980-992.
The statements regarding funding were incomplete and the following text has now been included in the Funding section:
This work was supported by the Fondation pour la Recherche Médicale, grant number [DEQ20140329501] to P.D.
Biology Open and the authors apologise to the readers for any confusion that this omission might have caused.
© 2016. Published by The Company of Biologists Ltd
2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
