Määttä, Kirsi
Rantapero, Tommi
Lindström, Anna
Nykter, Matti
Kankuri-Tammilehto, Minna
Laasanen, Satu-Leena
Schleutker, Johanna
Article History
Received: 22 January 2016
Revised: 30 August 2016
Accepted: 20 September 2016
First Online: 26 October 2016
Competing interests
: The authors declare no conflict of interest.