A Randomized, Double-Blind, Placebo-Controlled Trial on Intravenous Ibuprofen L-Lysine for the Early Closure of Nonsymptomatic Patent Ductus Arteriosus within 72 Hours of Birth in Extremely Low-Birth-Weight Infants - Aranda, Jacob V; Clyman, Ronald; Cox, Blair; Van Overmeire, Bart; Wozniak, Paul; Sosenko, Ilene; Carlo, Waldemar A; Ward, Robert M; Shalwitz, Robert; Baggs, Geraldine; Seth, Anand; Darko, Laszlo (American Journal of Perinatology, 2009)