Najib, S
Kowalski-Chauvel, A
Do, C
Roche, S
Cohen-Jonathan-Moyal, E
Seva, C
Article History
Received: 27 February 2014
Revised: 25 June 2014
Accepted: 3 July 2014
First Online: 11 August 2014
Competing interests
: The authors declare no conflict of interest.