1
by Blaasvær, Nora, Nøkleby, Heid, Johansen, Sissel, Berg, Rigmor C.
Published 2015
Norwegian Knowledge Centre for the Health Services

2
Published 2018
The National Academies Press

3
Published 2010
National Academies Press

5
Published 1992
National Academies Press

6
by Hilton, Margaret L.
Published 2008
National Academies Press

7
Published 2011
National Academies Press

10
Published 2011
National Academies Press (US)

12
Published 1997
National Academy Press

13
Published 1993
National Academy Press

14
Published 1971
National Academy of Sciences

15
Published 2019
The National Academies Press

17
by Casola, Linda Clare
Published 2020
National Academies Press (US)

18
by Wizemann, Theresa M.
Published 2019
National Academies Press

19
Published 1993
National Academy Press

20
by Wizemann, Theresa M.
Published 2019
National Academies Press