Einarsdottir, Elisabet
Hafrén, Lena
Leinonen, Eira
Bhutta, Mahmood F.
Kentala, Erna
Kere, Juha
Mattila, Petri S.
Article History
Received: 10 March 2016
Accepted: 22 August 2016
First Online: 16 September 2016
Competing interests
: The authors declare no competing financial interests.