Moermans, C
Bonnet, C
Willems, E
Baron, F
Nguyen, M
Henket, M
Sele, J
Corhay, J-L
Beguin, Y
Louis, R
Article History
Received: 3 February 2014
Revised: 8 June 2014
Accepted: 12 June 2014
First Online: 28 July 2014
Competing interests
: The authors declare no conflict of interest.