TOAN, D. T. T. .; YEN, L. T. .; VIET, H. Q. . Bài 2. Vietnam Journal of Preventive Medicine, [S. l.], v. 31, n. 10, p. 12–20, 2022. DOI: 10.51403/0868-2836/2021/489. Disponível em: https://vjpm.vn/index.php/vjpm/article/view/489. Acesso em: 19 may. 2024.