“37. VITAMIN D DEFICIENCY IN CHILDREN AGED UNDER 6 IN NGHE AN OBSTETRICS AND PEDIATRICS HOSPITAL IN 2023”. 2025. Vietnam Journal of Community Medicine 66 (CĐ6-HNKH Bệnh viện Sản nhi Nghệ An). https://doi.org/10.52163/yhc.v66iCD6.2303.