Angiogenic factors in superimposed preeclampsia: a longitudinal study of women with chronic hypertension during pregnancy.
Perni U, Sison C, Sharma V, Helseth G, Hawfield A, Suthanthiran M, August P. Angiogenic factors in superimposed preeclampsia: a longitudinal study of women with chronic hypertension during pregnancy. Hypertension. 2012 Mar; 59(3):740-6.