Meijnikman, A S
De Block, C E M
Dirinck, E
Verrijken, A
Mertens, I
Corthouts, B
Van Gaal, L F
Article History
Received: 23 July 2016
Revised: 13 April 2017
Accepted: 23 April 2017
First Online: 19 July 2017
Competing interests
: The authors declare no conflict of interest.