ANALYSIS OF DIRECT MEDICAL COSTS AND ASSOCIATED FACTORS IN THE TREATMENT OF PEDIATRIC PNEUMONIA AT THE DEPARTMENT OF PEDIATRICS, HANOI MEDICAL UNIVERSITY HOSPITAL. YHCĐ [Internet]. 2026 Nov. 4 [cited 2026 Nov. 8];67(10). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/6976