1. Congenital heart disease in 56,109 births. Incidence and natural history;Mitchell;Circulation,1971
2. Preterm birth: Case definition & guidelines for data collection, analysis, and presentation of immunisation safety data;Quinn;Vaccine,2016
3. Spontaneous closure of patent ductus arteriosus in infants = 1500 g;Semberova;Pediatrics,2017
4. Patent ductus arteriosus of the preterm infant;Hamrick;Pediatrics,2020
5. Morbidity and mortality in preterm neonates with patent ductus arteriosus on day 3;Sellmer;Archives of Disease in Childhood-Fetal and Neonatal Edition,2013