A novel echocardiography method to assess upper body systemic blood flow in preterm infants and comparison with superior vena cava flow measurement - Schena, Federico; Iannotta, Rossella; D’Andrea, Vito; Francescato, Gaia; Mayer, Alessandra; Mancini, Giuseppina; Prontera, Giorgia; Mosca, Fabio; Vento, Gianni (European Journal of Pediatrics, 2023)