Correction: Effect of different CPAP levels on ultrasound-assessed lung aeration and gas exchange in neonates - Victor Sartorius; Barbara Loi; Laura Vivalda; Giulia Regiroli; Sofia De La Rubia-Ortega; Lucilla Pezza; Manon Midavaine; Shivani Shankar-Aguilera; Rafik Ben-Ammar; Daniele De Luca (Respiratory Research)