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	1.	[Is nitrous oxide during labor a predisposing factor for later amphetamine abuse in children?]. [electronic resource] by Bergsø, P Producer: 19891205 In: Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke vol. 109 Availability: No items available. Save to lists Add to cart (remove)
	2.	Acta fifty years ago. Vitamins in pregnancy, the liver attacked, and more. [electronic resource] by Bergsø, P Producer: 19951005 In: Acta obstetricia et gynecologica Scandinavica vol. 74 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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