Sindhu, Naru Sai, Muthukumaran L, Chandrasekar S, Sekar Natarajan, Sridhar R, and Meenakshi N. “Association Between Forced Expiratory Volume in 1 Second /Forced Vital Capacity Ratio and Main Pulmonary Artery /Ascending Aorta Ratio in Chronic Obstructive Pulmonary Disease Patients – A Hospital Based Observational Study”. Journal of Neonatal Surgery 14, no. 25S (May 20, 2025): 687–693. Accessed September 25, 2025. https://www.jneonatalsurg.com/index.php/jns/article/view/6195.