Shekharappa, Chandrakala Bada, Edison Albert Balakrishnan Elizabeth, and Bharathi Balachander. “Association of Patent Ductus Arteriosus Size With Clinical Features and Short-Term Outcomes in Preterm Infants Less Than 34 Weeks”. Indian Journal of Child Health 7, no. 3 (March 19, 2020): 105–108. Accessed September 29, 2026. https://mansapublishers.com/ijch/article/view/2239.