Cuperus, Tryntsje
van Dijk, Albert
Matthijs, Mieke G. R.
Veldhuizen, Edwin J. A.
Haagsman, Henk P.
Article History
Received: 25 November 2015
Accepted: 4 May 2016
First Online: 27 May 2016
Competing interests
: The authors declare no competing financial interests.