Hvidt, K N
Olsen, M H
Ibsen, H
Holm, J-C
Article History
Received: 10 July 2014
Revised: 22 October 2014
Accepted: 21 November 2014
First Online: 15 January 2015
Competing interests
: KNH received LEO Pharma’s Travel Grant during data collection of the present study. The remaining authors declare no conflict of interest.