1. Report on high blood pressure in pregnancy (Consensus Report);National High Blood Pressure Working Group;Am J Obstet Gynecol,1990
2. World Health Organization 2nd ed Maternal Mortality: A Global Factbook 1991 WHO Division of Family Health Geneva
3. Neonatal outcome after preterm delivery for pre-eclampsia;Friedman;Am J Obstet Gynecol,1995