van Attekum, M H A
Terpstra, S
Slinger, E
von Lindern, M
Moerland, P D
Jongejan, A
Kater, A P
Eldering, E
Article History
Received: 19 October 2015
Revised: 5 December 2016
Accepted: 12 December 2016
First Online: 13 February 2017
Competing interests
: The authors declare no conflict of interest.