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5. Smoking cessation in pregnancy. Intervention among heavy smokers. Valbø A; Nylander G Acta Obstet Gynecol Scand; 1994 Mar; 73(3):215-9. PubMed ID: 8122501 [TBL] [Abstract][Full Text] [Related]
6. Randomised controlled trial of Doppler ultrasound screening of placental perfusion during pregnancy. Davies JA; Gallivan S; Spencer JA Lancet; 1992 Nov; 340(8831):1299-303. PubMed ID: 1360032 [TBL] [Abstract][Full Text] [Related]
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