1. Pregnancy-related mortality surveillance—United States, 1991-1999;Chang;MMWR Surveill Summ,2003
2. Determinants of maternal mortality: A hospitality based study from south India;Rajaram;Indian J Matern Child Health,1995
3. Severe maternal morbidity associated with hypertensive disorders in pregnancy in the United States;Zhang;Hypertens Pregnancy,2003
4. Cardiovascular hemodynamics in pregnancy and labor;Bader;Clin Obstet Gynecol,1968
5. Blood pressure, the renin-aldosterone system and sex steroids throughout normal pregnancy;Wilson;Am J Med,1980