Alyamovskaya, G. A., Keshishian, E. S., Verchenko, E. G., & Bereznitskaya, V. V. (2015). The clinical case of sildenafil administration in a very premature infant with pulmonary hypertension. Journal of Pediatric and Neonatal Individualized Medicine (JPNIM), 4(1), e040108. https://doi.org/10.7363/040108