Durinck, K
Van Loocke, W
Van der Meulen, J
Van de Walle, I
Ongenaert, M
Rondou, P
Wallaert, A
de Bock, C E
Van Roy, N
Poppe, B
Cools, J
Soulier, J
Taghon, T
Speleman, F
Van Vlierberghe, P
Article History
Received: 13 February 2015
Revised: 15 May 2015
Accepted: 9 June 2015
First Online: 25 June 2015
Competing interests
: The authors declare no conflict of interest.