Continuous Indomethacin Infusion May Be Less Effective than Bolus Infusions for Ductal Closure in Very Low Birth Weight Infants - de Vries, Nathalie K S; Jagroep, Farley K; Jaarsma, Anneke S; Elzenga, Nynke J; Bos, Arend F (American Journal of Perinatology, 2005)