@article{schmittgen2008,
  title={Analyzing real-time PCR data by the comparative CT method},
  author={Thomas D. Schmittgen and Kenneth J. Livak},
  year={2008},
  journal={Nature Protocols},
  doi={10.1038/nprot.2008.73},
  url={https://doi.org/10.1038/nprot.2008.73}
}