Ajimura, F.Y., Maia, A.S.S.F., Hachiya, A., Watanabe, A.S., Nunes, M. do P.T., Martins, M. de A. and Machado, F.S. 2005. Preoperative laboratory evaluation of patients aged over 40 years undergoing elective non-cardiac surgery. São Paulo Medical Journal. 123, 2 (Mar. 2005), 50–53.