@article{friedewald1972,
  title={Estimation of the Concentration of Low-Density Lipoprotein Cholesterol in Plasma, Without Use of the Preparative Ultracentrifuge},
  author={William T. Friedewald and Robert I. Levy and Donald S. Fredrickson},
  year={1972},
  journal={Clinical Chemistry},
  doi={10.1093/clinchem/18.6.499},
  url={https://doi.org/10.1093/clinchem/18.6.499}
}