Preeclampsia at delivery is associated with lower serum vitamin D and higher antiangiogenic factors: a case control study

David B. Seifer, Geralyn Lambert-Messerlian, Glenn E. Palomaki, Robert M. Silver, Corette Parker, Carol J. Rowland Hogue, Barbara J. Stoll, George R. Saade, Robert L. Goldenberg, Donald J. Dudley, Radek Bukowski, Halit Pinar, Uma M. Reddy