Lista, Gianluca, Silvia Bianchi, Savina Mannarino, Federico Schena, Francesca Castoldi, Mauro Stronati, and Fabio Mosca. “ Velocity Time Integral for Right Upper Pulmonary Vein in VLBW Infants With Patent Ductus Arteriosus ”. Clinics 71, no. 10 (October 1, 2016): 580–585. Accessed July 4, 2024. https://revistas.usp.br/clinics/article/view/122232.