Retreatment with surfactant in very low birth weight preterm infants: risk predictors and their influence on neonatal outcomes - Ferri, Walusa Assad Gonçalves; Silva, Adriana Carnevale da; Sacramento, Eliana Motta Fernandes; Calixto, Cristina; Aragon, Davi Casale; Caldas, Jamil Pedro de Siqueira (Revista Paulista de Pediatria, 2021)