Gopagondanahalli, Krishna Revanna, et al. “Late Paracetamol Therapy for Hemodynamically Significant Patent Ductus Arteriosus in Very Low Birth Weight Infants Born before 28+6 Weeks Gestation – Echocardiographic and Clinical Correlation”. Archives of Clinical and Medical Case Reports, vol. 5, no. 3, June 2021, pp. 503-1, https://fortunejournals.org/ojs/index.php/acmcr/article/view/22504.