@article{article4076,
  title = {Fragmented QRS is a marker of mortality in patients with severe COVID-19: A retrospective observational study},
  author = {},
  journal = {The Anatolian Journal of Cardiology},
  year = {2021},
  volume = {25},
  pages = {},
  doi = {10.5152/AnatolJCardiol.2021.62}
}