Slot, S
Smits, K
van de Donk, N W C J
Witte, B I
Raymakers, R
Janssen, J J W M
Broers, A E C
te Boekhorst, P A W
Zweegman, S
Article History
Received: 30 October 2014
Revised: 4 May 2015
Accepted: 2 June 2015
First Online: 3 August 2015
Competing interests
: The authors declare no conflict of interest.