Fetal renal artery impedance as assessed by Doppler ultrasound in pregnancies complicated by intraamniotic inflammation and preterm birth. - Azpurua H; Dulay AT; Buhimschi IA; Bahtiyar MO; Funai E; Abdel-Razeq SS; Luo G; Bhandari V; Copel JA; Buhimschi CS (American journal of obstetrics and gynecology, 2009)