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2. Use of surfactant for prophylaxis versus rescue treatment of respiratory distress syndrome: experience from an Italian-Bulgarian trial;Bevilacqua;Acta Biomed Ateneo Parmense,1997
3. Bovine surfactant replacement therapy in neonates of less than 30 weeks' gestation: a randomized controlled trial of prophylaxis vs treatment;Dunn;Pediatrics,1991
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