Simons, Colinda C. J. M.
Schouten, Leo J.
Godschalk, Roger W. L.
van Engeland, Manon
van den Brandt, Piet A.
van Schooten, Frederik J.
Weijenberg, Matty P.
Article History
Received: 11 March 2015
Accepted: 5 August 2015
First Online: 18 September 2015
Competing interests
: The authors declare no competing financial interests.