Sabzehei, M. K. , , Basiri, B. , , Shokouhi, M. , and Naser, M. . "A Comparative Study of Treatment Response of Respiratory Distress Syndrome in Preterm Infants: Early Nasal Intermittent Positive Pressure Ventilation versus Early Nasal Continuous Positive Airway Pressure", Journal of Pediatric Perspectives, 6, 10, 2018, 8339-8346. doi: 10.22038/ijp.2018.31577.2795