Löfvenmark, I
Hasselberg, M
Nilsson Wikmar, L
Hultling, C
Norrbrink, C
Article History
Received: 1 March 2016
Revised: 10 June 2016
Accepted: 1 July 2016
First Online: 16 August 2016
Competing interests
: The authors declare no conflict of interest.