5
by Hafstad, Elisabet, Leiknes, Kari Ann
Published 2016
National Institute of Public Health, Division of Health Services

8
by Fønhus, Marita S., Gundro Brurberg, Kjetil, Kirkehei, Ingvild, Strøm, Vegard
Published 2011
Knowledge Centre for the Health Services at The Norwegian Institute of Public Health (NIPH)

9
Published 1971
National Academy of Sciences

10
Published 2019
The National Academies Press

11
Published 1968
National Academy of Sciences

15
by Cuff, Patricia A.
Published 2016
The National Academies Press

17
by Nass, Sharyl J.
Published 2015
National Academies Press