NGUYỄN, M. H.; NGUYỄN, T. H. INITIAL APPLICATION OF SIGMA METRICS IN IMPROVING BIOCHEMICAL TESTS QUALITY CONTROL AT NGUYEN TRI PHUONG HOSPITAL. Vietnam Medical Journal, [S. l.], v. 537, n. 1, 2024. DOI: 10.51298/vmj.v537i1.9065. Disponível em: https://tapchiyhocvietnam.vn/index.php/vmj/article/view/9065. Acesso em: 18 may. 2024.