Yamasmit, W Prophylactic oral betamimetics for reducing preterm birth in women with a twin pregnancy. [electronic resource] - The Cochrane database of systematic reviews Jul 2005 - CD004733 p. digital Publication Type: Journal Article; Meta-Analysis; Review; Systematic Review ISSN: 1469-493X Standard No.: 10.1002/14651858.CD004733.pub2 doi Subjects--Topical Terms: Administration, OralFemaleGestational AgeHumansPregnancyPremature Birth--prevention & controlTocolytic Agents--administration & dosageTwins