Sildenafil citrate therapy for severe early-onset intrauterine growth restriction. - von Dadelszen, P; Dwinnell, S; Magee, LA; Carleton, BC; Gruslin, A; Lee, B; Lim, KI; Liston, RM; Miller, SP; Rurak, D; Sherlock, RL; Skoll, MA; et al. (BJOG: An International Journal of Obstetrics & Gynaecology, 2011)