Zdanowicz, Mariusz
Harra, Juha
Mäkelä, Jyrki M.
Heinonen, Esa
Ning, Tingyin
Kauranen, Martti
Genty, Goëry
Article History
Received: 21 May 2014
Accepted: 30 June 2014
First Online: 18 July 2014
Competing interests
: The authors declare no competing financial interests.