Macones, G A Efficacy of oral beta-agonist maintenance therapy in preterm labor: a meta-analysis. [electronic resource] - Obstetrics and gynecology Feb 1995 - 313-7 p. digital Publication Type: Journal Article; Meta-Analysis ISSN: 0029-7844 Standard No.: 10.1016/0029-7844(94)00374-M doi Subjects--Topical Terms: Administration, OralAdrenergic beta-Agonists--administration & dosageFemaleHumansObstetric Labor, Premature--drug therapyPregnancyRandomized Controlled Trials as Topic