Bantema-Joppe, E J
de Bock, G H
Woltman-van Iersel, M
Busz, D M
Ranchor, A V
Langendijk, J A
Maduro, J H
van den Heuvel, E R
Article History
Received: 22 August 2014
Revised: 13 November 2014
Accepted: 30 November 2014
First Online: 20 January 2015
Competing interests
: The authors declare no conflict of interest.