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1 2021 2 American College of Obstetricians and Gynecologists 2020 135 6 6 1492-5 3 2002 177 9 9 468 4 2012 8 10 10 563-5 5 2009 33 3 3 130-7 6 Direcção-Geral da Saúde 2015 7 2009 21 6 6 491-5 8 National Institute for Health and Care Excellence 2019 9 US Preventive Services Task Force.Bibbins-Domingo K.Grossman DC.Curry SJ.Barry MJ.Davidson KW.Doubeni CA.Epling JW Jr.Kemper AR.Krist AH.Kurth AE.Landefeld CS.Mangione CM.Phillips WR.Phipps MG.Silverstein M.Simon MA.Tseng CW 2017 317 16 16 1661-7 10 2002 177 9 9 477-80