Le Pen, J
Laurent, M
Sarosiek, K
Vuillier, C
Gautier, F
Montessuit, S
Martinou, J C
Letaï, A
Braun, F
Juin, P P
Article History
Received: 4 August 2015
Revised: 7 December 2015
Accepted: 9 December 2015
First Online: 4 February 2016
Competing interests
: The authors declare no conflict of interest.