Indomethacin Therapy for Patent Ductus Arteriosus in Premature Infants: Efficacy of a Dosing Strategy Based on a Second-Dose Peak Plasma Indomethacin Level and Estimated Plasma Indomethacin Levels - O'Donovan, Donough J; Fernandes, Caraciolo J; Nguyen, Ngoc-Yen ; Adams, Karen ; Adams, James M (American Journal of Perinatology, 2004)