Bygdell, M
Ohlsson, C
Célind, J
Saternus, J
Sondén, A
Kindblom, J M
Article History
Received: 2 September 2016
Revised: 12 December 2016
Accepted: 11 January 2017
First Online: 25 January 2017
Competing interests
: The authors declare no conflict of interest.