7
Published 2016
National Center for Biotechnology Information (US)

8
Published 2016
The National Academies Press

11
Published 2016
Canadian Agency for Drugs and Technologies in Health

13
Published 2016
National Academies Press

14
Published 2015
World Health Organization

18
Published 2015
Canadian Agency for Drugs and Technologies in Health

19
Published 1995
National Academies Press

20
by Bogard, Kimber
Published 2014
National Academies Press