TREATMENT OUTCOMES OF PHARMACOLOGICAL CLOSURE OF PATENT DUCTUS ARTERIOSUS IN PRETERM INFANTS UNDER 34 WEEKS OF GESTATION AT THE VIETNAM NATIONAL CHILDREN’S HOSPITAL. YHCĐ [Internet]. 2026 Apr. 2 [cited 2026 Sept. 8];67(CĐ3-NCKH). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/4711