Wiklund-Hörnqvist, Carola
Andersson, Micael
Jonsson, Bert
Nyberg, Lars
Article History
Received: 20 June 2017
Revised: 21 September 2017
Accepted: 27 September 2017
First Online: 2 November 2017
Competing interests
: The authors declare that they have no competing financial interests.