@misc{indiciae20ff50bf856c,
  title = {Letter: Creatine phosphokinase.},
  author = {D Halbersleben},
  year = {1974},
  doi = {10.1001/jama.1974.03230480011005},
  url = {https://pubmed.ncbi.nlm.nih.gov/4408253/},
  note = {Source identifier: 4408253}
}