Niemi, Merja H.
Rytkönen-Nissinen, Marja
Miettinen, Ilja
Jänis, Janne
Virtanen, Tuomas
Rouvinen, Juha
Article History
Received: 1 April 2015
Accepted: 11 August 2015
First Online: 8 September 2015
Competing interests
: M.N., J.J. and J.R. are shareholders of Desentum Oy. The rest of the authors declare that they have no relevant conflicts of interest.