Ibrahim EL-Zoghby, Sara Aly, Shereen Elgengeehy, M. Hamed, and Karim Mashhour. “Lung Ultrasound Scoring System Vs ROX Index As a Predictor for Progression to the Invasive Mechanical Ventilation in COVID-19 Patients”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 7, Apr. 2023, pp. 125-32, doi:10.47750/jptcp.2023.30.07.015.