21
by Niessen, Louis W.
Published 2012
Agency for Healthcare Research and Quality, U.S. Department of Health and Human Services

23
Published 2000
National Academies Press

24
by Mosteller, Frederick
Published 1989
National Academy Press

26
by Pray, Leslie A.
Published 2011
National Academies Press

27
Published 1998
Agency for Healthcare Research and Quality

28
Published 2013
National Center for Biotechnology Information (US)

29
Published 2011
National Academies Press (US)

31
Published 2002
National Academy Press

34
by Kuntz, Karen
Published 2013
Agency for Healthcare Research and Quality

36
by Lustig, Tracy A.
Published 2013
National Academies Press

37
Published 1992
National Academy Press

38
Published 2000
National Academy Press

39
Published 2001
National Academy Press

40
Published 1985
National Academy Press