Hayashi, A
Le Gal, K
Södersten, K
Vizlin-Hodzic, D
Ågren, H
Funa, K
Article History
Received: 20 February 2014
Revised: 11 June 2014
Accepted: 23 July 2014
First Online: 14 October 2014
Competing interests
: The authors declare no conflict of interest.