Löfvenborg, J E
Andersson, T
Carlsson, P-O
Dorkhan, M
Groop, L
Martinell, M
Tuomi, T
Wolk, A
Carlsson, S
Article History
Received: 3 July 2014
Revised: 18 August 2014
Accepted: 2 September 2014
First Online: 20 October 2014
Competing interests
: The authors declare no conflict of interest.