Evaluation of sigma metrics in a Medical Biochemistry lab. International Journal of Biomedical Research, [S. l.], v. 6, n. 3, p. 164–171, 2015. DOI: 10.7439/ijbr.v6i3.1709. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/1709. Acesso em: 29 mar. 2026.