Wessels, Marja W
Herkert, Johanna C
Frohn-Mulder, Ingrid M
Dalinghaus, Michiel
van den Wijngaard, Arthur
de Krijger, Ronald R
Michels, Michelle
de Coo, Irenaeus FM
Hoedemaekers, Yvonne M
Dooijes, Dennis
Article History
Received: 20 February 2014
Revised: 8 August 2014
Accepted: 9 September 2014
First Online: 22 October 2014
Competing interests
: The authors declare no conflict of interest.