Trần, T. N. T.; Trần, T. T.; Nguyễn, T. T.; Nguyễn, H. L. Q.; Trần, Đ. T. P. STUDY ON CLINICAL AND SUBCLINICAL CHARACTERISTICS AND RISK FACTORS OF SEVERE PNEUMONIA IN CHILDREN FROM 2 MONTHS TO 5 YEARS OLD AT HAU GIANG OBSTETRICS AND PEDIATRICS HOSPITAL. VMJ 2024, 540.