Association between the Glu298Asp and T(-786)C polymorphisms of the endothelial nitric oxide synthase gene and respiratory distress in preterm neonates - Ercan Sivasli; Melih Babaoğlu; Umit Yaşar; Murat Yurdakök; Atila Bozkurt; Ayşe Korkmaz; Sule Yiğit; Gülsevin Tekinalp (The Turkish Journal of Pediatrics)