Shekharappa, C. B.; Elizabeth, E. A. B.; Balachander, B. Association of Patent Ductus Arteriosus Size With Clinical Features and Short-Term Outcomes in Preterm Infants Less Than 34 Weeks. Indian J Child Health 2020, 7 (3), 105-108. https://doi.org/10.32677/IJCH.2020.v07.i03.003.