RESULTS OF TREATMENT PNEUMONIA FOR CHILDREN FROM 2 MONTHS TO 5 YEARS OLD AT YEN PHONG HEALTH CENTER, PROVINCE BAC NINH. YHCĐ [Internet]. 2021 Oct. 2 [cited 2026 Nov. 9];62(6 (2021). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/177