Potjer, Thomas P
Kranenburg, Heidi E
Bergman, Wilma
de Vos tot Nederveen Cappel, Wouter H
van Monsjou, Hester S
Barge-Schaapveld, Daniela Q C M
Vasen, Hans F A
Article History
Received: 25 February 2014
Revised: 12 June 2014
Accepted: 10 August 2014
First Online: 17 September 2014
Competing interests
: The authors declare no conflict of interest.