Ajimura, F. Y., A. S. S. F. Maia, A. Hachiya, A. S. Watanabe, M. do P. T. Nunes, M. de A. Martins, and F. S. Machado. “Preoperative Laboratory Evaluation of Patients Aged over 40 Years Undergoing Elective Non-Cardiac Surgery”. São Paulo Medical Journal, vol. 123, no. 2, Mar. 2005, pp. 50-53, https://periodicosapm.emnuvens.com.br/spmj/article/view/2321.