Willems, Els
Guerrero-Bosagna, Carlos
Decuypere, Eddy
Janssens, Steven
Buyse, Johan
Buys, Nadine
Jensen, Per
Everaert, Nadia
Article History
Received: 13 August 2015
Accepted: 7 January 2016
First Online: 10 February 2016
Competing interests
: The authors declare no competing financial interests.