1. University of Nantes, Nantes, France
2. erwan.david@univ-nantes.fr
3. University of Nantes and Nantes University Hospital, Nantes, France
4. pierre.lebranchu@chu-nantes.fr
5. matthieu.perreiradasilva@univ-nantes.frhttp://www.perreira.net/matthieu/about/
6. patrick.lecallet@univ-nantes.frhttp://pagesperso.ls2n.fr/∼lecallet-p/index.html