@misc{indiciae1a2149692e4d,
  title = {Urea or creatinine?},
  author = {N Gretz and M Strauch},
  year = {1979},
  doi = {10.1016/s0140-6736(79)92200-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/90942/},
  note = {Source identifier: 90942}
}