Gurvits, Natalia
Löyttyniemi, Eliisa
Nykänen, Marjukka
Kuopio, Teijo
Kronqvist, Pauliina
Talvinen, Kati
Article History
Received: 5 May 2017
Revised: 29 June 2017
Accepted: 4 August 2017
First Online: 31 August 2017
Competing interests
: The authors declare no conflict of interest.