Balleda, L.; Ijjada, A.; Kolla, S.; Thimmapuram, C. S. R. The Utility Value of SpO2/FiO2 (S/F) and PaO2/FiO2 (P/F) Ratios for Predicting Initiation and Efficiency of HFNC in Children With Respiratory Distress Admitted in PICU. Int J Contemp Pediatr 2025, 12, 609-614.