@misc{indiciae5abb924016ef,
  title = {CD137: costimulator turns suppressor?},
  author = {Aymen Al-Shamkhani},
  year = {2004},
  doi = {10.1111/j.1365-2567.2004.01963.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/15312132/},
  note = {Source identifier: 15312132}
}