21
Published 2015
U.S. Department of Health and Human Services

22
Published 2016
U.S. Department of Health and Human Services, Public Health Service, Office of the Surgeon General

23
Published 2016
U.S. Department of Health and Human Services, Office of the Surgeon General

24
Published 2021
US Department of Health and Human Services

25
Published 2021
National Institute of Dental and Craniofacial Research

26
by Porter, Donna Viola
Published 1990
National Academy Press

27
by Coyle, Susan L.
Published 1991
National Academy Press

28
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

29
Published 2001
Dept. of Health and Human Services, U.S. Public Health Service

30
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service

31
Published 2001
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

32
Published 2002
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

33
Published 2008
U.S. Dept. of Health and Human Services, Public Health Service

34
Published 2012
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

35
Published 2004
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

36
Published 2009
Office of the Surgeon General (US)

37
Published 2001
Dept. of Health and Human Services, U.S. Public Health Service

38
Published 2007
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

40
Published 2006
U.S. Dept. of Health and Human Services, Public Health Service, Office of Surgeon General