41
Published 2009
National Academies Press

42
by Olson, Steve
Published 2011
National Academies Press

44
Published 2008
National Academies Press

45
Published 2003
National Academies Press

46
Published 2004
National Academies Press

47
Published 2004
National Academies Press

48
Published 2006
National Academies Press

50
Published 2009
RCOG Press

54
by Blaasvær, Nora, Nøkleby, Heid, Johansen, Sissel, Berg, Rigmor C.
Published 2015
Norwegian Knowledge Centre for the Health Services

55
Published 2021
National Institute for Health and Care Excellence (NICE)

56
Published 2022
National Institute for Health and Care Excellence (NICE)

57
by Caulfield, Laura E.
Published 2022
Agency for Healthcare Research and Quality, U.S. Department of Health and Human Services

60
Published 1988
National Academy Press