Frouws, M A
Bastiaannet, E
Langley, R E
Chia, W K
van Herk-Sukel, M P P
Lemmens, V E P P
Putter, H
Hartgrink, H H
Bonsing, B A
Van de Velde, C J H
Portielje, J E A
Liefers, G J
Article History
Received: 12 September 2016
Revised: 23 November 2016
Accepted: 28 November 2016
First Online: 10 January 2017
Competing interests
: The authors declare no conflict of interest.