1. Guide to clinical preventative services: an assessment of the effectiveness of 169 interventions;US Preventative Services Taskforce,1989
2. Immediate consequences of preterm birth;Brown,1984
3. Randomized investigation of magnesium sulfate for prevention of premature birth;Cox;Am J Obstet Gynecol,1990
4. Preterm labor at 32-34 weeks gestation: effect of a policy of expectant management on length of gestation;Linehart;Am J Obstet Gynecol,1990
5. Uterine electromyography: a critical review;Devedeux;Am J Obstet Gynecol,1993