Vårdal, Linda
Wong, Gladys
Øiestad, Åse Marit Leere
Pedersen-Bjergaard, Stig
Gjelstad, Astrid
Øiestad, Elisabeth Leere
Funding for this research was provided by:
The Research Council of Norway (231917)
Article History
Received: 7 February 2018
Revised: 7 May 2018
Accepted: 16 May 2018
First Online: 8 June 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.