Preoperative laboratory evaluation of patients aged over 40 years undergoing elective non-cardiac surgery oleh Fábio Yoshito Ajimura, Alex Silva Santos Freire Maia, Adriana Hachiya, Alexandra Sayuri Watanabe, Maria do Patrocínio Tenório Nunes, Mílton de Arruda Martins, Fábio Santana Machado