Nieuweboer, A J M
Smid, M
de Graan, A-J M
Elbouazzaoui, S
de Bruijn, P
Eskens, F A L M
Hamberg, P
Martens, J W M
Sparreboom, A
de Wit, R
van Schaik, R H N
Mathijssen, R H J
Article History
Received: 25 January 2015
Revised: 12 July 2015
Accepted: 10 August 2015
First Online: 8 September 2015
Competing interests
: The authors declare no conflict of interest.