Freis, Patricia
Graillot, Emmanuelle
Rousset, Pascal
Hervieu, Valérie
Chardon, Laurence
Lombard-Bohas, Catherine
Walter, Thomas
Article History
Received: 13 September 2016
Accepted: 7 December 2016
First Online: 11 January 2017
Competing interests
: The authors declare no competing financial interests.