Prevention and 18-month outcomes of serious pulmonary hemorrhage in extremely low birth weight infants: results from the trial of indomethacin prophylaxis in preterms - Alfaleh, K; Smyth, J A; Roberts, R S; Solimano, A; Asztalos, E V; Schmidt, B (Pediatrics, 2008)
; Trial of Indomethacin Prophylaxis in Preterms Investigators.