@article{helfried metzler2007protection,
  title={Cardiac protection by preoperative intervention in noncardiac surgery},
  author={helfried metzler,s. archan},
  journal={Signa Vitae},
  volume={2},
  number={S1},
  pages={19--22},
  doi = {10.22514/SV21.052007.3},
  year={2007}
}